72706550 has 48 divisors (see below), whose sum is σ = 158180352. Its totient is φ = 24343200.

The previous prime is 72706549. The next prime is 72706561. The reversal of 72706550 is 5560727.

It is a happy number.

It is a super-3 number, since 3×72706550³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12635 + ... + 17465.

It is an arithmetic number, because the mean of its divisors is an integer number (3295424).

Almost surely, 2^72706550 is an apocalyptic number.

72706550 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

72706550 is an abundant number, since it is smaller than the sum of its proper divisors (85473802).

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

72706550 is a wasteful number, since it uses less digits than its factorization.

72706550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4893 (or 4888 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 32.

The square root of 72706550 is about 8526.8135900816. The cubic root of 72706550 is about 417.3731551982.

The spelling of 72706550 in words is "seventy-two million, seven hundred six thousand, five hundred fifty".