74478464 has 16 divisors (see below), whose sum is σ = 148375320. Its totient is φ = 37239168.

The previous prime is 74478463. The next prime is 74478487. The reversal of 74478464 is 46487447.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74478463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 290804 + ... + 291059.

Almost surely, 2^74478464 is an apocalyptic number.

It is an amenable number.

74478464 is a deficient number, since it is larger than the sum of its proper divisors (73896856).

74478464 is an equidigital number, since it uses as much as digits as its factorization.

74478464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581877 (or 581865 counting only the distinct ones).

The product of its digits is 602112, while the sum is 44.

The square root of 74478464 is about 8630.0906136610. The cubic root of 74478464 is about 420.7365458253.

The spelling of 74478464 in words is "seventy-four million, four hundred seventy-eight thousand, four hundred sixty-four".