1897923036 has 12 divisors (see below), whose sum is σ = 4428487112. Its totient is φ = 632641008.

The previous prime is 1897923023. The next prime is 1897923037. The reversal of 1897923036 is 6303297981.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1897923036² = 7204223701158914592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1897923037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79080115 + ... + 79080138.

Almost surely, 2^1897923036 is an apocalyptic number.

It is an amenable number.

1897923036 is an abundant number, since it is smaller than the sum of its proper divisors (2530564076).

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

1897923036 is a wasteful number, since it uses less digits than its factorization.

1897923036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158160260 (or 158160258 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 48.

The square root of 1897923036 is about 43565.1585099836. The cubic root of 1897923036 is about 1238.1108581761.

The spelling of 1897923036 in words is "one billion, eight hundred ninety-seven million, nine hundred twenty-three thousand, thirty-six".