13619964 has 24 divisors (see below), whose sum is σ = 32110288. Its totient is φ = 4492800.

The previous prime is 13619953. The next prime is 13619987. The reversal of 13619964 is 46991631.

It is a super-2 number, since 2×13619964² = 371006838722592, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4687 + ... + 7014.

Almost surely, 2^13619964 is an apocalyptic number.

It is an amenable number.

13619964 is an abundant number, since it is smaller than the sum of its proper divisors (18490324).

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

13619964 is a wasteful number, since it uses less digits than its factorization.

13619964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11805 (or 11803 counting only the distinct ones).

The product of its digits is 34992, while the sum is 39.

The square root of 13619964 is about 3690.5235400956. The cubic root of 13619964 is about 238.8133788228.

It can be divided in two parts, 1361 and 9964, that added together give a triangular number (11325 = T₁₅₀).

The spelling of 13619964 in words is "thirteen million, six hundred nineteen thousand, nine hundred sixty-four".