74385144 has 24 divisors (see below), whose sum is σ = 201459960. Its totient is φ = 24795024.

The previous prime is 74385139. The next prime is 74385163. The reversal of 74385144 is 44158347.

It is a tau number, because it is divible by the number of its divisors (24).

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 = 74385099 and 74385108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 516492 + ... + 516635.

It is an arithmetic number, because the mean of its divisors is an integer number (8394165).

Almost surely, 2^74385144 is an apocalyptic number.

It is an amenable number.

74385144 is an abundant number, since it is smaller than the sum of its proper divisors (127074816).

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

74385144 is a wasteful number, since it uses less digits than its factorization.

74385144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033139 (or 1033132 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 74385144 is about 8624.6822550167. The cubic root of 74385144 is about 420.5607476038.

It can be divided in two parts, 74385 and 144, that added together give a square (74529 = 273²).

The spelling of 74385144 in words is "seventy-four million, three hundred eighty-five thousand, one hundred forty-four".