74445560 has 64 divisors (see below), whose sum is σ = 193475520. Its totient is φ = 25251840.

The previous prime is 74445557. The next prime is 74445577. The reversal of 74445560 is 6554447.

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

It is a self number, because there is not a number n which added to its sum of digits gives 74445560.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25790 + ... + 28530.

It is an arithmetic number, because the mean of its divisors is an integer number (3023055).

Almost surely, 2^74445560 is an apocalyptic number.

74445560 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74445560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96737760).

74445560 is an abundant number, since it is smaller than the sum of its proper divisors (119029960).

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

74445560 is a wasteful number, since it uses less digits than its factorization.

74445560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2856 (or 2852 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 35.

The square root of 74445560 is about 8628.1840499609. The cubic root of 74445560 is about 420.6745773323.

The spelling of 74445560 in words is "seventy-four million, four hundred forty-five thousand, five hundred sixty".