74479986 has 48 divisors (see below), whose sum is σ = 191265984. Its totient is φ = 21279024.

The previous prime is 74479939. The next prime is 74479991. The reversal of 74479986 is 68997447.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 7545 + ... + 14348.

It is an arithmetic number, because the mean of its divisors is an integer number (3984708).

Almost surely, 2^74479986 is an apocalyptic number.

74479986 is an abundant number, since it is smaller than the sum of its proper divisors (116785998).

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

74479986 is a wasteful number, since it uses less digits than its factorization.

74479986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21917 (or 21905 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 74479986 is about 8630.1787930494. The cubic root of 74479986 is about 420.7394117842.

The spelling of 74479986 in words is "seventy-four million, four hundred seventy-nine thousand, nine hundred eighty-six".