610621440 has 384 divisors, whose sum is σ = 2311545600. Its totient is φ = 135659520.

The previous prime is 610621439. The next prime is 610621441. The reversal of 610621440 is 44126016.

It is an interprime number because it is at equal distance from previous prime (610621439) and next prime (610621441).

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 610621440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (610621441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4392891 + ... + 4393029.

It is an arithmetic number, because the mean of its divisors is an integer number (6019650).

Almost surely, 2^610621440 is an apocalyptic number.

610621440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 610621440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1155772800).

610621440 is an abundant number, since it is smaller than the sum of its proper divisors (1700924160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

610621440 is a wasteful number, since it uses less digits than its factorization.

610621440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 610621440 is about 24710.7555529976. The cubic root of 610621440 is about 848.3805103777.

Adding to 610621440 its reverse (44126016), we get a palindrome (654747456).

The spelling of 610621440 in words is "six hundred ten million, six hundred twenty-one thousand, four hundred forty".