72867550 has 48 divisors (see below), whose sum is σ = 157480992. Its totient is φ = 24566400.

The previous prime is 72867533. The next prime is 72867583. The reversal of 72867550 is 5576827.

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, 19644 + ... + 23056.

It is an arithmetic number, because the mean of its divisors is an integer number (3280854).

Almost surely, 2^72867550 is an apocalyptic number.

72867550 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

72867550 is an abundant number, since it is smaller than the sum of its proper divisors (84613442).

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

72867550 is a wasteful number, since it uses less digits than its factorization.

72867550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3493 (or 3488 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 72867550 is about 8536.2491763069. The cubic root of 72867550 is about 417.6810024689.

The spelling of 72867550 in words is "seventy-two million, eight hundred sixty-seven thousand, five hundred fifty".