74031440 has 40 divisors (see below), whose sum is σ = 196713600. Its totient is φ = 25382016.

The previous prime is 74031437. The next prime is 74031469. The reversal of 74031440 is 4413047.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65540 + ... + 66659.

It is an arithmetic number, because the mean of its divisors is an integer number (4917840).

Almost surely, 2^74031440 is an apocalyptic number.

74031440 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

74031440 is an abundant number, since it is smaller than the sum of its proper divisors (122682160).

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

74031440 is a wasteful number, since it uses less digits than its factorization.

74031440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132219 (or 132213 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 74031440 is about 8604.1524858640. The cubic root of 74031440 is about 419.8930944840.

Adding to 74031440 its reverse (4413047), we get a palindrome (78444487).

The spelling of 74031440 in words is "seventy-four million, thirty-one thousand, four hundred forty".