1897280107956 has 48 divisors (see below), whose sum is σ = 4920108580800. Its totient is φ = 632268016416.

The previous prime is 1897280107909. The next prime is 1897280107967. The reversal of 1897280107956 is 6597010827981.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1897280107893 and 1897280107902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1771170 + ... + 2632793.

It is an arithmetic number, because the mean of its divisors is an integer number (102502262100).

Almost surely, 2^{1897280107956} is an apocalyptic number.

It is an amenable number.

1897280107956 is an abundant number, since it is smaller than the sum of its proper divisors (3022828472844).

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

1897280107956 is a wasteful number, since it uses less digits than its factorization.

1897280107956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4407965 (or 4407957 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 63.

The spelling of 1897280107956 in words is "one trillion, eight hundred ninety-seven billion, two hundred eighty million, one hundred seven thousand, nine hundred fifty-six".