72238550 has 12 divisors (see below), whose sum is σ = 134363796. Its totient is φ = 28895400.

The previous prime is 72238511. The next prime is 72238567. The reversal of 72238550 is 5583227.

It is a super-2 number, since 2×72238550² = 10436816212205000, which contains 22 as substring.

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 5 ways as a sum of consecutive naturals, for example, 722336 + ... + 722435.

It is an arithmetic number, because the mean of its divisors is an integer number (11196983).

Almost surely, 2^72238550 is an apocalyptic number.

72238550 is a deficient number, since it is larger than the sum of its proper divisors (62125246).

72238550 is a wasteful number, since it uses less digits than its factorization.

72238550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1444783 (or 1444778 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 72238550 is about 8499.3264439013. The cubic root of 72238550 is about 416.4757062731.

The spelling of 72238550 in words is "seventy-two million, two hundred thirty-eight thousand, five hundred fifty".