1897601972 has 48 divisors (see below), whose sum is σ = 3999690240. Its totient is φ = 769541472.

The previous prime is 1897601903. The next prime is 1897602011. The reversal of 1897601972 is 2791067981.

It is a self number, because there is not a number n which added to its sum of digits gives 1897601972.

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, 617183 + ... + 620249.

It is an arithmetic number, because the mean of its divisors is an integer number (83326880).

Almost surely, 2^1897601972 is an apocalyptic number.

It is an amenable number.

1897601972 is an abundant number, since it is smaller than the sum of its proper divisors (2102088268).

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

1897601972 is a wasteful number, since it uses less digits than its factorization.

1897601972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4260 (or 4258 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 50.

The square root of 1897601972 is about 43561.4734828839. The cubic root of 1897601972 is about 1238.0410388289.

The spelling of 1897601972 in words is "one billion, eight hundred ninety-seven million, six hundred one thousand, nine hundred seventy-two".