74021280 has 48 divisors (see below), whose sum is σ = 233168544. Its totient is φ = 19738880.

The previous prime is 74021279. The next prime is 74021293. The reversal of 74021280 is 8212047.

It is a tau number, because it is divible by the number of its divisors (48).

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 74021280.

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, 76626 + ... + 77585.

It is an arithmetic number, because the mean of its divisors is an integer number (4857678).

Almost surely, 2^74021280 is an apocalyptic number.

It is an amenable number.

74021280 is an abundant number, since it is smaller than the sum of its proper divisors (159147264).

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

74021280 is a wasteful number, since it uses less digits than its factorization.

74021280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154229 (or 154221 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 74021280 is about 8603.5620530104. The cubic root of 74021280 is about 419.8738850373.

The spelling of 74021280 in words is "seventy-four million, twenty-one thousand, two hundred eighty".