74445552 has 60 divisors (see below), whose sum is σ = 215540520. Its totient is φ = 23958144.

The previous prime is 74445493. The next prime is 74445557. The reversal of 74445552 is 25554447.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74445557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4738 + ... + 13089.

It is an arithmetic number, because the mean of its divisors is an integer number (3592342).

Almost surely, 2^74445552 is an apocalyptic number.

74445552 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

74445552 is an abundant number, since it is smaller than the sum of its proper divisors (141094968).

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

74445552 is a wasteful number, since it uses less digits than its factorization.

74445552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17870 (or 17861 counting only the distinct ones).

The product of its digits is 112000, while the sum is 36.

The square root of 74445552 is about 8628.1835863639. The cubic root of 74445552 is about 420.6745622636.

Adding to 74445552 its reverse (25554447), we get a palindrome (99999999).

It can be divided in two parts, 7444 and 5552, that added together give a square (12996 = 114²).

The spelling of 74445552 in words is "seventy-four million, four hundred forty-five thousand, five hundred fifty-two".