74866820 has 48 divisors (see below), whose sum is σ = 184076928. Its totient is φ = 25040640.

The previous prime is 74866819. The next prime is 74866837. The reversal of 74866820 is 2866847.

It is a Harshad number since it is a multiple of its sum of digits (41).

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, 782 + ... + 12261.

It is an arithmetic number, because the mean of its divisors is an integer number (3834936).

Almost surely, 2^74866820 is an apocalyptic number.

74866820 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74866820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92038464).

74866820 is an abundant number, since it is smaller than the sum of its proper divisors (109210108).

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

74866820 is a wasteful number, since it uses less digits than its factorization.

74866820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13100 (or 13098 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 74866820 is about 8652.5614704549. The cubic root of 74866820 is about 421.4665661699.

The spelling of 74866820 in words is "seventy-four million, eight hundred sixty-six thousand, eight hundred twenty".