74297440 has 48 divisors (see below), whose sum is σ = 200606112. Its totient is φ = 25473024.

The previous prime is 74297417. The next prime is 74297471. The reversal of 74297440 is 4479247.

It is a self number, because there is not a number n which added to its sum of digits gives 74297440.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32049 + ... + 34288.

It is an arithmetic number, because the mean of its divisors is an integer number (4179294).

Almost surely, 2^74297440 is an apocalyptic number.

74297440 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

74297440 is an abundant number, since it is smaller than the sum of its proper divisors (126308672).

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

74297440 is a wasteful number, since it uses less digits than its factorization.

74297440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66359 (or 66351 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 74297440 is about 8619.5962782488. The cubic root of 74297440 is about 420.3953948478.

The spelling of 74297440 in words is "seventy-four million, two hundred ninety-seven thousand, four hundred forty".