74857440 has 96 divisors (see below), whose sum is σ = 269498880. Its totient is φ = 17109504.

The previous prime is 74857421. The next prime is 74857441. The reversal of 74857440 is 4475847.

It is a tau number, because it is divible by the number of its divisors (96).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74857441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7780 + ... + 14499.

It is an arithmetic number, because the mean of its divisors is an integer number (2807280).

Almost surely, 2^74857440 is an apocalyptic number.

74857440 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

74857440 is an abundant number, since it is smaller than the sum of its proper divisors (194641440).

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

74857440 is a wasteful number, since it uses less digits than its factorization.

74857440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22304 (or 22296 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 39.

The square root of 74857440 is about 8652.0194174539. The cubic root of 74857440 is about 421.4489637059.

The spelling of 74857440 in words is "seventy-four million, eight hundred fifty-seven thousand, four hundred forty".