74721474 has 16 divisors (see below), whose sum is σ = 166047840. Its totient is φ = 24907140.

The previous prime is 74721461. The next prime is 74721529. The reversal of 74721474 is 47412747.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 691812 + ... + 691919.

It is an arithmetic number, because the mean of its divisors is an integer number (10377990).

Almost surely, 2^74721474 is an apocalyptic number.

74721474 is an abundant number, since it is smaller than the sum of its proper divisors (91326366).

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

74721474 is a wasteful number, since it uses less digits than its factorization.

74721474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383742 (or 1383736 counting only the distinct ones).

The product of its digits is 43904, while the sum is 36.

The square root of 74721474 is about 8644.1583743011. The cubic root of 74721474 is about 421.1936452479.

The spelling of 74721474 in words is "seventy-four million, seven hundred twenty-one thousand, four hundred seventy-four".