74725638 has 16 divisors (see below), whose sum is σ = 160947696. Its totient is φ = 22992480.

The previous prime is 74725633. The next prime is 74725639. The reversal of 74725638 is 83652747.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 74725638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74725631) 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, 478933 + ... + 479088.

It is an arithmetic number, because the mean of its divisors is an integer number (10059231).

Almost surely, 2^74725638 is an apocalyptic number.

74725638 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

74725638 is an abundant number, since it is smaller than the sum of its proper divisors (86222058).

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

74725638 is a wasteful number, since it uses less digits than its factorization.

74725638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958039.

The product of its digits is 282240, while the sum is 42.

The square root of 74725638 is about 8644.3992272453. The cubic root of 74725638 is about 421.2014690486.

The spelling of 74725638 in words is "seventy-four million, seven hundred twenty-five thousand, six hundred thirty-eight".