1897463636 has 12 divisors (see below), whose sum is σ = 3515888628. Its totient is φ = 892924032.

The previous prime is 1897463629. The next prime is 1897463647. The reversal of 1897463636 is 6363647981.

It can be written as a sum of positive squares in 2 ways, for example, as 672883600 + 1224580036 = 25940^2 + 34994^2 .

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13951871 + ... + 13952006.

It is an arithmetic number, because the mean of its divisors is an integer number (292990719).

Almost surely, 2^1897463636 is an apocalyptic number.

It is an amenable number.

1897463636 is a deficient number, since it is larger than the sum of its proper divisors (1618424992).

1897463636 is a wasteful number, since it uses less digits than its factorization.

1897463636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27903898 (or 27903896 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 53.

The square root of 1897463636 is about 43559.8856288673. The cubic root of 1897463636 is about 1238.0109535231.

The spelling of 1897463636 in words is "one billion, eight hundred ninety-seven million, four hundred sixty-three thousand, six hundred thirty-six".