74978455 has 16 divisors (see below), whose sum is σ = 93592224. Its totient is φ = 57617280.

The previous prime is 74978447. The next prime is 74978471. The reversal of 74978455 is 55487947.

It is not a de Polignac number, because 74978455 - 2³ = 74978447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74978399 and 74978408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10257 + ... + 15973.

It is an arithmetic number, because the mean of its divisors is an integer number (5849514).

Almost surely, 2^74978455 is an apocalyptic number.

74978455 is a deficient number, since it is larger than the sum of its proper divisors (18613769).

74978455 is a wasteful number, since it uses less digits than its factorization.

74978455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5826.

The product of its digits is 1411200, while the sum is 49.

The square root of 74978455 is about 8659.0100473437. The cubic root of 74978455 is about 421.6759471018.

The spelling of 74978455 in words is "seventy-four million, nine hundred seventy-eight thousand, four hundred fifty-five".