74978457 has 8 divisors (see below), whose sum is σ = 100135776. Its totient is φ = 49903392.

The previous prime is 74978447. The next prime is 74978471. The reversal of 74978457 is 75487947.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 74978457 - 2⁴ = 74978441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74978447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18403 + ... + 22104.

It is an arithmetic number, because the mean of its divisors is an integer number (12516972).

Almost surely, 2^74978457 is an apocalyptic number.

It is an amenable number.

74978457 is a deficient number, since it is larger than the sum of its proper divisors (25157319).

74978457 is a wasteful number, since it uses less digits than its factorization.

74978457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41127.

The product of its digits is 1975680, while the sum is 51.

The square root of 74978457 is about 8659.0101628304. The cubic root of 74978457 is about 421.6759508511.

The spelling of 74978457 in words is "seventy-four million, nine hundred seventy-eight thousand, four hundred fifty-seven".