1626481620 has 72 divisors (see below), whose sum is σ = 5116404384. Its totient is φ = 433727136.

The previous prime is 1626481609. The next prime is 1626481621. The reversal of 1626481620 is 261846261.

1626481620 is a `hidden beast` number, since 1 + 6 + 2 + 648 + 1 + 6 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1626481621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 162474 + ... + 172193.

It is an arithmetic number, because the mean of its divisors is an integer number (71061172).

Almost surely, 2^1626481620 is an apocalyptic number.

1626481620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1626481620 is an abundant number, since it is smaller than the sum of its proper divisors (3489922764).

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

1626481620 is a wasteful number, since it uses less digits than its factorization.

1626481620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334691 (or 334677 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 1626481620 is about 40329.6617888125. The cubic root of 1626481620 is about 1176.0245465514.

The spelling of 1626481620 in words is "one billion, six hundred twenty-six million, four hundred eighty-one thousand, six hundred twenty".