74400978 has 16 divisors (see below), whose sum is σ = 152431776. Its totient is φ = 24195360.

The previous prime is 74400973. The next prime is 74401003. The reversal of 74400978 is 87900447.

It is not an unprimeable number, because it can be changed into a prime (74400973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150976 + ... + 151467.

It is an arithmetic number, because the mean of its divisors is an integer number (9526986).

Almost surely, 2^74400978 is an apocalyptic number.

74400978 is an abundant number, since it is smaller than the sum of its proper divisors (78030798).

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

74400978 is a wasteful number, since it uses less digits than its factorization.

74400978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302489.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 74400978 is about 8625.6001530328. The cubic root of 74400978 is about 420.5905863865.

The spelling of 74400978 in words is "seventy-four million, four hundred thousand, nine hundred seventy-eight".