74204820 has 36 divisors (see below), whose sum is σ = 225088500. Its totient is φ = 19787904.

The previous prime is 74204807. The next prime is 74204827. The reversal of 74204820 is 2840247.

It can be written as a sum of positive squares in 2 ways, for example, as 9659664 + 64545156 = 3108^2 + 8034^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×74204820² = 11012710622464800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74204827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 205945 + ... + 206304.

Almost surely, 2^74204820 is an apocalyptic number.

It is an amenable number.

74204820 is an abundant number, since it is smaller than the sum of its proper divisors (150883680).

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

74204820 is a wasteful number, since it uses less digits than its factorization.

74204820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412264 (or 412259 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 74204820 is about 8614.2219613846. The cubic root of 74204820 is about 420.2206323775.

The spelling of 74204820 in words is "seventy-four million, two hundred four thousand, eight hundred twenty".