15620000400 has 135 divisors (see below), whose sum is σ = 54231775689. Its totient is φ = 4163333760.

The previous prime is 15620000381. The next prime is 15620000413. The reversal of 15620000400 is 400002651.

It is a happy number.

The square root of 15620000400 is 124980.

It is a perfect power (a square), and thus also a powerful number.

15620000400 is a `hidden beast` number, since 1 + 5 + 620 + 0 + 0 + 0 + 40 + 0 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5623200144 + 9996800256 = 74988^2 + 99984^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 7497759 + ... + 7499841.

Almost surely, 2^15620000400 is an apocalyptic number.

15620000400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15620000400 is the 124980-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15620000400

15620000400 is an abundant number, since it is smaller than the sum of its proper divisors (38611775289).

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

15620000400 is an equidigital number, since it uses as much as digits as its factorization.

15620000400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4190 (or 2093 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The spelling of 15620000400 in words is "fifteen billion, six hundred twenty million, four hundred", and thus it is an aban number.