74172770 has 96 divisors (see below), whose sum is σ = 169413120. Its totient is φ = 23224320.

The previous prime is 74172757. The next prime is 74172781. The reversal of 74172770 is 7727147.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 74172770.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 288482 + ... + 288738.

It is an arithmetic number, because the mean of its divisors is an integer number (1764720).

Almost surely, 2^74172770 is an apocalyptic number.

74172770 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

74172770 is an abundant number, since it is smaller than the sum of its proper divisors (95240350).

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

74172770 is a wasteful number, since it uses less digits than its factorization.

74172770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328 (or 321 counting only the distinct ones).

The product of its (nonzero) digits is 19208, while the sum is 35.

The square root of 74172770 is about 8612.3614647784. The cubic root of 74172770 is about 420.1601241304.

The spelling of 74172770 in words is "seventy-four million, one hundred seventy-two thousand, seven hundred seventy".