74898978 has 32 divisors (see below), whose sum is σ = 186762240. Its totient is φ = 19454160.

The previous prime is 74898977. The next prime is 74898997. The reversal of 74898978 is 87989847.

It is not an unprimeable number, because it can be changed into a prime (74898973) 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, 80598 + ... + 81521.

It is an arithmetic number, because the mean of its divisors is an integer number (5836320).

Almost surely, 2^74898978 is an apocalyptic number.

74898978 is an abundant number, since it is smaller than the sum of its proper divisors (111863262).

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

74898978 is a wasteful number, since it uses less digits than its factorization.

74898978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162142.

The product of its digits is 8128512, while the sum is 60.

The square root of 74898978 is about 8654.4195645924. The cubic root of 74898978 is about 421.5269025633.

The spelling of 74898978 in words is "seventy-four million, eight hundred ninety-eight thousand, nine hundred seventy-eight".