74939040 has 384 divisors, whose sum is σ = 304819200. Its totient is φ = 17003520.

The previous prime is 74938993. The next prime is 74939063. The reversal of 74939040 is 4093947.

It is a super-2 number, since 2×74939040² = 11231719432243200, which contains 22 as substring.

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 = 74938986 and 74939004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 902839 + ... + 902921.

It is an arithmetic number, because the mean of its divisors is an integer number (793800).

Almost surely, 2^74939040 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 74939040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152409600).

74939040 is an abundant number, since it is smaller than the sum of its proper divisors (229880160).

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

74939040 is a wasteful number, since it uses less digits than its factorization.

74939040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 74939040 is about 8656.7337951447. The cubic root of 74939040 is about 421.6020446691.

The spelling of 74939040 in words is "seventy-four million, nine hundred thirty-nine thousand, forty".