72751990 has 64 divisors (see below), whose sum is σ = 143410176. Its totient is φ = 26497152.

The previous prime is 72751979. The next prime is 72751997. The reversal of 72751990 is 9915727.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72751997) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 706279 + ... + 706381.

It is an arithmetic number, because the mean of its divisors is an integer number (2240784).

Almost surely, 2^72751990 is an apocalyptic number.

72751990 is a deficient number, since it is larger than the sum of its proper divisors (70658186).

72751990 is a wasteful number, since it uses less digits than its factorization.

72751990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253.

The product of its (nonzero) digits is 39690, while the sum is 40.

The square root of 72751990 is about 8529.4777096842. The cubic root of 72751990 is about 417.4600867816.

It can be divided in two parts, 727519 and 90, that added together give a square (727609 = 853²).

The spelling of 72751990 in words is "seventy-two million, seven hundred fifty-one thousand, nine hundred ninety".