74979280 has 20 divisors (see below), whose sum is σ = 174327012. Its totient is φ = 29991680.

The previous prime is 74979277. The next prime is 74979313. The reversal of 74979280 is 8297947.

It can be written as a sum of positive squares in 2 ways, for example, as 21455424 + 53523856 = 4632^2 + 7316^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 74979280.

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, 468541 + ... + 468700.

Almost surely, 2^74979280 is an apocalyptic number.

It is an amenable number.

74979280 is an abundant number, since it is smaller than the sum of its proper divisors (99347732).

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

74979280 is a wasteful number, since it uses less digits than its factorization.

74979280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937254 (or 937248 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 74979280 is about 8659.0576854528. The cubic root of 74979280 is about 421.6774936855.

The spelling of 74979280 in words is "seventy-four million, nine hundred seventy-nine thousand, two hundred eighty".