74479640 has 16 divisors (see below), whose sum is σ = 167579280. Its totient is φ = 29791840.

The previous prime is 74479619. The next prime is 74479649. The reversal of 74479640 is 4697447.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74479649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 930956 + ... + 931035.

It is an arithmetic number, because the mean of its divisors is an integer number (10473705).

Almost surely, 2^74479640 is an apocalyptic number.

It is an amenable number.

74479640 is an abundant number, since it is smaller than the sum of its proper divisors (93099640).

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

74479640 is a wasteful number, since it uses less digits than its factorization.

74479640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1862002 (or 1861998 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 41.

The square root of 74479640 is about 8630.1587470915. The cubic root of 74479640 is about 420.7387602622.

The spelling of 74479640 in words is "seventy-four million, four hundred seventy-nine thousand, six hundred forty".