72402438 has 8 divisors (see below), whose sum is σ = 144804888. Its totient is φ = 24134144.

The previous prime is 72402427. The next prime is 72402461. The reversal of 72402438 is 83420427.

It is a sphenic number, since it is the product of 3 distinct primes.

72402438 is an admirable number.

It is a super-2 number, since 2×72402438² = 10484226056687688, 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 3 ways as a sum of consecutive naturals, for example, 6033531 + ... + 6033542.

It is an arithmetic number, because the mean of its divisors is an integer number (18100611).

Almost surely, 2^72402438 is an apocalyptic number.

72402438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

72402438 is a wasteful number, since it uses less digits than its factorization.

72402438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12067078.

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 72402438 is about 8508.9622163928. The cubic root of 72402438 is about 416.7904219772.

The spelling of 72402438 in words is "seventy-two million, four hundred two thousand, four hundred thirty-eight".