74677780 has 24 divisors (see below), whose sum is σ = 163642752. Its totient is φ = 28572192.

The previous prime is 74677777. The next prime is 74677793. The reversal of 74677780 is 8777647.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a self number, because there is not a number n which added to its sum of digits gives 74677780.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80712 + ... + 81631.

It is an arithmetic number, because the mean of its divisors is an integer number (6818448).

Almost surely, 2^74677780 is an apocalyptic number.

It is an amenable number.

74677780 is an abundant number, since it is smaller than the sum of its proper divisors (88964972).

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

74677780 is a wasteful number, since it uses less digits than its factorization.

74677780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162375 (or 162373 counting only the distinct ones).

The product of its (nonzero) digits is 460992, while the sum is 46.

The square root of 74677780 is about 8641.6306331618. The cubic root of 74677780 is about 421.1115304174. Note that the first 3 decimals are identical.

It can be divided in two parts, 74677 and 780, that added together give a palindrome (75457).

The spelling of 74677780 in words is "seventy-four million, six hundred seventy-seven thousand, seven hundred eighty".