1897655928 has 48 divisors (see below), whose sum is σ = 5518696680. Its totient is φ = 542187072.

The previous prime is 1897655897. The next prime is 1897655959. The reversal of 1897655928 is 8295567981.

It is an interprime number because it is at equal distance from previous prime (1897655897) and next prime (1897655959).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 805651 + ... + 808002.

Almost surely, 2^1897655928 is an apocalyptic number.

It is an amenable number.

1897655928 is an abundant number, since it is smaller than the sum of its proper divisors (3621040752).

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

1897655928 is a wasteful number, since it uses less digits than its factorization.

1897655928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1613676 (or 1613665 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 60.

The square root of 1897655928 is about 43562.0927871929. The cubic root of 1897655928 is about 1238.0527727806.

The spelling of 1897655928 in words is "one billion, eight hundred ninety-seven million, six hundred fifty-five thousand, nine hundred twenty-eight".