18969408 has 42 divisors (see below), whose sum is σ = 54374034. Its totient is φ = 6322944.

The previous prime is 18969403. The next prime is 18969409. The reversal of 18969408 is 80496981.

18969408 is a `hidden beast` number, since 189 + 69 + 408 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11614464 + 7354944 = 3408^2 + 2712^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18969403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15891 + ... + 17042.

Almost surely, 2^18969408 is an apocalyptic number.

18969408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18969408 is an abundant number, since it is smaller than the sum of its proper divisors (35404626).

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

18969408 is a wasteful number, since it uses less digits than its factorization.

18969408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32951 (or 32938 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 18969408 is about 4355.3883868147. The cubic root of 18969408 is about 266.6968743558.

The spelling of 18969408 in words is "eighteen million, nine hundred sixty-nine thousand, four hundred eight".