74342780 has 12 divisors (see below), whose sum is σ = 156119880. Its totient is φ = 29737104.

The previous prime is 74342777. The next prime is 74342791. The reversal of 74342780 is 8724347.

It is a self number, because there is not a number n which added to its sum of digits gives 74342780.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1858550 + ... + 1858589.

It is an arithmetic number, because the mean of its divisors is an integer number (13009990).

Almost surely, 2^74342780 is an apocalyptic number.

It is an amenable number.

74342780 is an abundant number, since it is smaller than the sum of its proper divisors (81777100).

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

74342780 is a wasteful number, since it uses less digits than its factorization.

74342780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3717148 (or 3717146 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 74342780 is about 8622.2259306979. The cubic root of 74342780 is about 420.4808928643.

The spelling of 74342780 in words is "seventy-four million, three hundred forty-two thousand, seven hundred eighty".