1625428838 has 32 divisors (see below), whose sum is σ = 2695457952. Its totient is φ = 728985600.

The previous prime is 1625428813. The next prime is 1625428843. The reversal of 1625428838 is 8388245261.

It is a junction number, because it is equal to n+sod(n) for n = 1625428792 and 1625428801.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 597770 + ... + 600482.

It is an arithmetic number, because the mean of its divisors is an integer number (84233061).

Almost surely, 2^1625428838 is an apocalyptic number.

1625428838 is a deficient number, since it is larger than the sum of its proper divisors (1070029114).

1625428838 is a wasteful number, since it uses less digits than its factorization.

1625428838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3080.

The product of its digits is 737280, while the sum is 47.

The square root of 1625428838 is about 40316.6074713635. The cubic root of 1625428838 is about 1175.7707544221.

The spelling of 1625428838 in words is "one billion, six hundred twenty-five million, four hundred twenty-eight thousand, eight hundred thirty-eight".