1897923344 has 20 divisors (see below), whose sum is σ = 3677954700. Its totient is φ = 948773760.

The previous prime is 1897923343. The next prime is 1897923353. The reversal of 1897923344 is 4433297981.

It can be written as a sum of positive squares in 2 ways, for example, as 1044582400 + 853340944 = 32320^2 + 29212^2 .

It is a super-2 number, since 2×1897923344² = 7204226039400284672, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1897923292 and 1897923301.

It is not an unprimeable number, because it can be changed into a prime (1897923343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109514 + ... + 125654.

It is an arithmetic number, because the mean of its divisors is an integer number (183897735).

Almost surely, 2^1897923344 is an apocalyptic number.

It is an amenable number.

1897923344 is a deficient number, since it is larger than the sum of its proper divisors (1780031356).

1897923344 is a wasteful number, since it uses less digits than its factorization.

1897923344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23498 (or 23492 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 50.

The square root of 1897923344 is about 43565.1620449184. The cubic root of 1897923344 is about 1238.1109251507.

The spelling of 1897923344 in words is "one billion, eight hundred ninety-seven million, nine hundred twenty-three thousand, three hundred forty-four".