1897663496 has 16 divisors (see below), whose sum is σ = 3563384940. Its totient is φ = 947427520.

The previous prime is 1897663483. The next prime is 1897663499. The reversal of 1897663496 is 6943667981.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1884775396 + 12888100 = 43414^2 + 3590^2 .

It is a super-2 number, since 2×1897663496² = 7202253488101884032, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1897663499) 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, 169775 + ... + 180606.

Almost surely, 2^1897663496 is an apocalyptic number.

It is an amenable number.

1897663496 is a deficient number, since it is larger than the sum of its proper divisors (1665721444).

1897663496 is a wasteful number, since it uses less digits than its factorization.

1897663496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351064 (or 351060 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 59.

The square root of 1897663496 is about 43562.1796516198. The cubic root of 1897663496 is about 1238.0544185954.

The spelling of 1897663496 in words is "one billion, eight hundred ninety-seven million, six hundred sixty-three thousand, four hundred ninety-six".