74631640 has 16 divisors (see below), whose sum is σ = 167921280. Its totient is φ = 29852640.

The previous prime is 74631631. The next prime is 74631647. The reversal of 74631640 is 4613647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74631647) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 932856 + ... + 932935.

It is an arithmetic number, because the mean of its divisors is an integer number (10495080).

Almost surely, 2^74631640 is an apocalyptic number.

It is an amenable number.

74631640 is an abundant number, since it is smaller than the sum of its proper divisors (93289640).

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

74631640 is a wasteful number, since it uses less digits than its factorization.

74631640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1865802 (or 1865798 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 74631640 is about 8638.9605856260. The cubic root of 74631640 is about 421.0247840026.

The spelling of 74631640 in words is "seventy-four million, six hundred thirty-one thousand, six hundred forty".