74999820 has 48 divisors (see below), whose sum is σ = 240000768. Its totient is φ = 17142720.

The previous prime is 74999809. The next prime is 74999839. The reversal of 74999820 is 2899947.

It is a happy number.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 74999820.

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, 88866 + ... + 89705.

It is an arithmetic number, because the mean of its divisors is an integer number (5000016).

Almost surely, 2^74999820 is an apocalyptic number.

74999820 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

74999820 is an abundant number, since it is smaller than the sum of its proper divisors (165000948).

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

74999820 is a wasteful number, since it uses less digits than its factorization.

74999820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178590 (or 178588 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 74999820 is about 8660.2436455333. The cubic root of 74999820 is about 421.7159952775.

The spelling of 74999820 in words is "seventy-four million, nine hundred ninety-nine thousand, eight hundred twenty".