74813780 has 12 divisors (see below), whose sum is σ = 157108980. Its totient is φ = 29925504.

The previous prime is 74813777. The next prime is 74813789. The reversal of 74813780 is 8731847.

It can be written as a sum of positive squares in 2 ways, for example, as 52041796 + 22771984 = 7214^2 + 4772^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74813789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1870325 + ... + 1870364.

It is an arithmetic number, because the mean of its divisors is an integer number (13092415).

Almost surely, 2^74813780 is an apocalyptic number.

It is an amenable number.

74813780 is an abundant number, since it is smaller than the sum of its proper divisors (82295200).

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

74813780 is a wasteful number, since it uses less digits than its factorization.

74813780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3740698 (or 3740696 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 74813780 is about 8649.4959390707. The cubic root of 74813780 is about 421.3670121982.

The spelling of 74813780 in words is "seventy-four million, eight hundred thirteen thousand, seven hundred eighty".