74439648 has 84 divisors (see below), whose sum is σ = 219797928. Its totient is φ = 24805440.

The previous prime is 74439647. The next prime is 74439667. The reversal of 74439648 is 84693447.

It is a super-2 number, since 2×74439648² = 11082522388727808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74439647) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 21733 + ... + 24923.

It is an arithmetic number, because the mean of its divisors is an integer number (2616642).

Almost surely, 2^74439648 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 74439648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109898964).

74439648 is an abundant number, since it is smaller than the sum of its proper divisors (145358280).

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

74439648 is an equidigital number, since it uses as much as digits as its factorization.

74439648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3219 (or 3196 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 74439648 is about 8627.8414449965. The cubic root of 74439648 is about 420.6634412577.

The spelling of 74439648 in words is "seventy-four million, four hundred thirty-nine thousand, six hundred forty-eight".