1625723928 has 24 divisors (see below), whose sum is σ = 4403002500. Its totient is φ = 541907952.

The previous prime is 1625723893. The next prime is 1625723947. The reversal of 1625723928 is 8293275261.

1625723928 is a `hidden beast` number, since 1 + 6 + 257 + 2 + 392 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11289678 + ... + 11289821.

Almost surely, 2^1625723928 is an apocalyptic number.

1625723928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1625723928 is an abundant number, since it is smaller than the sum of its proper divisors (2777278572).

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

1625723928 is a wasteful number, since it uses less digits than its factorization.

1625723928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22579511 (or 22579504 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 1625723928 is about 40320.2669634019. The cubic root of 1625723928 is about 1175.8419022509.

The spelling of 1625723928 in words is "one billion, six hundred twenty-five million, seven hundred twenty-three thousand, nine hundred twenty-eight".