72523830 has 32 divisors (see below), whose sum is σ = 181626624. Its totient is φ = 18498656.

The previous prime is 72523783. The next prime is 72523859. The reversal of 72523830 is 3832527.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51864 + ... + 53243.

It is an arithmetic number, because the mean of its divisors is an integer number (5675832).

Almost surely, 2^72523830 is an apocalyptic number.

72523830 is an abundant number, since it is smaller than the sum of its proper divisors (109102794).

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

72523830 is a wasteful number, since it uses less digits than its factorization.

72523830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105140.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 72523830 is about 8516.0924137776. The cubic root of 72523830 is about 417.0232261675.

The spelling of 72523830 in words is "seventy-two million, five hundred twenty-three thousand, eight hundred thirty".