72258978 has 16 divisors (see below), whose sum is σ = 157656096. Its totient is φ = 21896640.

The previous prime is 72258973. The next prime is 72258983. The reversal of 72258978 is 87985227.

It is an interprime number because it is at equal distance from previous prime (72258973) and next prime (72258983).

It is not an unprimeable number, because it can be changed into a prime (72258971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 547351 + ... + 547482.

It is an arithmetic number, because the mean of its divisors is an integer number (9853506).

Almost surely, 2^72258978 is an apocalyptic number.

72258978 is an abundant number, since it is smaller than the sum of its proper divisors (85397118).

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

72258978 is a wasteful number, since it uses less digits than its factorization.

72258978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094849.

The product of its digits is 564480, while the sum is 48.

The square root of 72258978 is about 8500.5281012417. The cubic root of 72258978 is about 416.5149603089.

The spelling of 72258978 in words is "seventy-two million, two hundred fifty-eight thousand, nine hundred seventy-eight".