74345544 has 144 divisors (see below), whose sum is σ = 252399420. Its totient is φ = 19595520.

The previous prime is 74345501. The next prime is 74345563. The reversal of 74345544 is 44554347.

74345544 is a `hidden beast` number, since 74 + 3 + 45 + 544 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 74132100 + 213444 = 8610^2 + 462^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 74345499 and 74345508.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 45054 + ... + 46674.

Almost surely, 2^74345544 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 74345544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126199710).

74345544 is an abundant number, since it is smaller than the sum of its proper divisors (178053876).

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

74345544 is a wasteful number, since it uses less digits than its factorization.

74345544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660 (or 1646 counting only the distinct ones).

The product of its digits is 134400, while the sum is 36.

The square root of 74345544 is about 8622.3862126444. The cubic root of 74345544 is about 420.4861038378.

The spelling of 74345544 in words is "seventy-four million, three hundred forty-five thousand, five hundred forty-four".