74706816 has 64 divisors (see below), whose sum is σ = 199475280. Its totient is φ = 24772608.

The previous prime is 74706791. The next prime is 74706817. The reversal of 74706816 is 61860747.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×74706816² = 11162216713715712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74706817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98310 + ... + 99066.

Almost surely, 2^74706816 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 74706816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99737640).

74706816 is an abundant number, since it is smaller than the sum of its proper divisors (124768464).

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

74706816 is a wasteful number, since it uses less digits than its factorization.

74706816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031 (or 1019 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 74706816 is about 8643.3104768948. The cubic root of 74706816 is about 421.1661018039.

The spelling of 74706816 in words is "seventy-four million, seven hundred six thousand, eight hundred sixteen".