1897872057 has 48 divisors (see below), whose sum is σ = 2948836800. Its totient is φ = 1172620800.

The previous prime is 1897872029. The next prime is 1897872089. The reversal of 1897872057 is 7502787981.

It is a happy number.

It is not a de Polignac number, because 1897872057 - 2⁷ = 1897871929 is a prime.

It is a super-2 number, since 2×1897872057² = 7203836689482822498, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1897871994 and 1897872012.

It is not an unprimeable number, because it can be changed into a prime (1897872007) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3157557 + ... + 3158157.

It is an arithmetic number, because the mean of its divisors is an integer number (61434100).

Almost surely, 2^1897872057 is an apocalyptic number.

It is an amenable number.

1897872057 is a deficient number, since it is larger than the sum of its proper divisors (1050964743).

1897872057 is a wasteful number, since it uses less digits than its factorization.

1897872057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998 (or 995 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 54.

The square root of 1897872057 is about 43564.5734169405. The cubic root of 1897872057 is about 1238.0997726864.

It can be divided in two parts, 189787 and 2057, that added together give a square (191844 = 438²).

The spelling of 1897872057 in words is "one billion, eight hundred ninety-seven million, eight hundred seventy-two thousand, fifty-seven".