1989695236 has 9 divisors (see below), whose sum is σ = 3482122791. Its totient is φ = 994803012.

The previous prime is 1989695233. The next prime is 1989695237. The reversal of 1989695236 is 6325969891.

The square root of 1989695236 is 44606.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×1989695236² = 7917774264322191392, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1989695231) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 78061 + ... + 100363.

Almost surely, 2^1989695236 is an apocalyptic number.

1989695236 is the 44606-th square number.

It is an amenable number.

1989695236 is a deficient number, since it is larger than the sum of its proper divisors (1492427555).

1989695236 is an frugal number, since it uses more digits than its factorization.

1989695236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44610 (or 22305 counting only the distinct ones).

The product of its digits is 6298560, while the sum is 58.

The cubic root of 1989695236 is about 1257.7534580213.

It can be divided in two parts, 1989 and 695236, that added together give a square (697225 = 835²).

The spelling of 1989695236 in words is "one billion, nine hundred eighty-nine million, six hundred ninety-five thousand, two hundred thirty-six".