1925721628 has 12 divisors (see below), whose sum is σ = 3370368960. Its totient is φ = 962759072.

The previous prime is 1925721613. The next prime is 1925721653. The reversal of 1925721628 is 8261275291.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31125 + ... + 69427.

It is an arithmetic number, because the mean of its divisors is an integer number (280864080).

Almost surely, 2^1925721628 is an apocalyptic number.

It is an amenable number.

1925721628 is a deficient number, since it is larger than the sum of its proper divisors (1444647332).

1925721628 is a wasteful number, since it uses less digits than its factorization.

1925721628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50876 (or 50874 counting only the distinct ones).

The product of its digits is 120960, while the sum is 43.

The square root of 1925721628 is about 43883.0448806826. The cubic root of 1925721628 is about 1244.1263911104.

The spelling of 1925721628 in words is "one billion, nine hundred twenty-five million, seven hundred twenty-one thousand, six hundred twenty-eight".