612061440 has 144 divisors (see below), whose sum is σ = 2057899200. Its totient is φ = 154607616.

The previous prime is 612061433. The next prime is 612061447. The reversal of 612061440 is 44160216.

It is an interprime number because it is at equal distance from previous prime (612061433) and next prime (612061447).

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 612061440.

It is not an unprimeable number, because it can be changed into a prime (612061447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68766 + ... + 77154.

Almost surely, 2^612061440 is an apocalyptic number.

612061440 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 612061440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1028949600).

612061440 is an abundant number, since it is smaller than the sum of its proper divisors (1445837760).

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

612061440 is a wasteful number, since it uses less digits than its factorization.

612061440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8432 (or 8418 counting only the distinct ones).

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

The square root of 612061440 is about 24739.8755049414. The cubic root of 612061440 is about 849.0468855255.

The spelling of 612061440 in words is "six hundred twelve million, sixty-one thousand, four hundred forty".