74457984 has 64 divisors (see below), whose sum is σ = 200638080. Its totient is φ = 24460800.

The previous prime is 74457973. The next prime is 74457997. The reversal of 74457984 is 48975447.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 25899 + ... + 28629.

It is an arithmetic number, because the mean of its divisors is an integer number (3134970).

Almost surely, 2^74457984 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 74457984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100319040).

74457984 is an abundant number, since it is smaller than the sum of its proper divisors (126180096).

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

74457984 is a wasteful number, since it uses less digits than its factorization.

74457984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2819 (or 2807 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 48.

The square root of 74457984 is about 8628.9039860228. The cubic root of 74457984 is about 420.6979777439.

The spelling of 74457984 in words is "seventy-four million, four hundred fifty-seven thousand, nine hundred eighty-four".