72320658 has 32 divisors (see below), whose sum is σ = 147308544. Its totient is φ = 23666832.

The previous prime is 72320641. The next prime is 72320659. The reversal of 72320658 is 85602327.

It is not an unprimeable number, because it can be changed into a prime (72320659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81091 + ... + 81977.

It is an arithmetic number, because the mean of its divisors is an integer number (4603392).

Almost surely, 2^72320658 is an apocalyptic number.

72320658 is an abundant number, since it is smaller than the sum of its proper divisors (74987886).

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

72320658 is a wasteful number, since it uses less digits than its factorization.

72320658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 72320658 is about 8504.1553372454. The cubic root of 72320658 is about 416.6334384880.

The spelling of 72320658 in words is "seventy-two million, three hundred twenty thousand, six hundred fifty-eight".