74573856 has 144 divisors (see below), whose sum is σ = 246250368. Its totient is φ = 20966400.

The previous prime is 74573839. The next prime is 74573897. The reversal of 74573856 is 65837547.

74573856 is a `hidden beast` number, since 74 + 573 + 8 + 5 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×74573856² = 11122519997417472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 142876 + ... + 143396.

It is an arithmetic number, because the mean of its divisors is an integer number (1710072).

Almost surely, 2^74573856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74573856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123125184).

74573856 is an abundant number, since it is smaller than the sum of its proper divisors (171676512).

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

74573856 is a wasteful number, since it uses less digits than its factorization.

74573856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615 (or 604 counting only the distinct ones).

The product of its digits is 705600, while the sum is 45.

The square root of 74573856 is about 8635.6155542034. The cubic root of 74573856 is about 420.9160956158.

The spelling of 74573856 in words is "seventy-four million, five hundred seventy-three thousand, eight hundred fifty-six".