74512144 has 60 divisors (see below), whose sum is σ = 169780428. Its totient is φ = 31584000.

The previous prime is 74512133. The next prime is 74512153. The reversal of 74512144 is 44121547.

It can be written as a sum of positive squares in 2 ways, for example, as 61465600 + 13046544 = 7840^2 + 3612^2 .

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78714 + ... + 79654.

Almost surely, 2^74512144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74512144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84890214).

74512144 is an abundant number, since it is smaller than the sum of its proper divisors (95268284).

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

74512144 is a wasteful number, since it uses less digits than its factorization.

74512144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064 (or 1051 counting only the distinct ones).

The product of its digits is 4480, while the sum is 28.

The square root of 74512144 is about 8632.0417051819. The cubic root of 74512144 is about 420.7999568689.

The spelling of 74512144 in words is "seventy-four million, five hundred twelve thousand, one hundred forty-four".