74405856 has 96 divisors (see below), whose sum is σ = 224598528. Its totient is φ = 21127680.

The previous prime is 74405839. The next prime is 74405879. The reversal of 74405856 is 65850447.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176526 + ... + 176946.

It is an arithmetic number, because the mean of its divisors is an integer number (2339568).

Almost surely, 2^74405856 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 74405856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112299264).

74405856 is an abundant number, since it is smaller than the sum of its proper divisors (150192672).

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

74405856 is a wasteful number, since it uses less digits than its factorization.

74405856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704 (or 696 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 74405856 is about 8625.8829113315. The cubic root of 74405856 is about 420.5997780042.

The spelling of 74405856 in words is "seventy-four million, four hundred five thousand, eight hundred fifty-six".