74642440 has 32 divisors (see below), whose sum is σ = 168192000. Its totient is φ = 29813184.

The previous prime is 74642419. The next prime is 74642459. The reversal of 74642440 is 4424647.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50431 + ... + 51889.

It is an arithmetic number, because the mean of its divisors is an integer number (5256000).

Almost surely, 2^74642440 is an apocalyptic number.

It is an amenable number.

74642440 is an abundant number, since it is smaller than the sum of its proper divisors (93549560).

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

74642440 is a wasteful number, since it uses less digits than its factorization.

74642440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2749 (or 2745 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 31.

The square root of 74642440 is about 8639.5856382121. The cubic root of 74642440 is about 421.0450919593.

The spelling of 74642440 in words is "seventy-four million, six hundred forty-two thousand, four hundred forty".