72801550 has 24 divisors (see below), whose sum is σ = 135785952. Its totient is φ = 29040000.

The previous prime is 72801539. The next prime is 72801557. The reversal of 72801550 is 5510827.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72801557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18235 + ... + 21865.

It is an arithmetic number, because the mean of its divisors is an integer number (5657748).

Almost surely, 2^72801550 is an apocalyptic number.

72801550 is a deficient number, since it is larger than the sum of its proper divisors (62984402).

72801550 is a wasteful number, since it uses less digits than its factorization.

72801550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4044 (or 4039 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 72801550 is about 8532.3824339981. The cubic root of 72801550 is about 417.5548591065.

The spelling of 72801550 in words is "seventy-two million, eight hundred one thousand, five hundred fifty".