72103836 has 48 divisors (see below), whose sum is σ = 193052160. Its totient is φ = 20518080.

The previous prime is 72103813. The next prime is 72103847. The reversal of 72103836 is 63830127.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21001 + ... + 24191.

It is an arithmetic number, because the mean of its divisors is an integer number (4021920).

Almost surely, 2^72103836 is an apocalyptic number.

It is an amenable number.

72103836 is an abundant number, since it is smaller than the sum of its proper divisors (120948324).

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

72103836 is a wasteful number, since it uses less digits than its factorization.

72103836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3474 (or 3472 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 72103836 is about 8491.3977647970. The cubic root of 72103836 is about 416.2166570520.

The spelling of 72103836 in words is "seventy-two million, one hundred three thousand, eight hundred thirty-six".