74699648 has 32 divisors (see below), whose sum is σ = 149540160. Its totient is φ = 37168128.

The previous prime is 74699629. The next prime is 74699693. The reversal of 74699648 is 84699647.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×74699648² = 11160074822647808, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 74699648.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27236 + ... + 29852.

It is an arithmetic number, because the mean of its divisors is an integer number (4673130).

Almost surely, 2^74699648 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 74699648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74770080).

74699648 is an abundant number, since it is smaller than the sum of its proper divisors (74840512).

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

74699648 is a wasteful number, since it uses less digits than its factorization.

74699648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2854 (or 2842 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 53.

The square root of 74699648 is about 8642.8958110115. The cubic root of 74699648 is about 421.1526313009.

Subtracting 74699648 from its reverse (84699647), we obtain a palindrome (9999999).

The spelling of 74699648 in words is "seventy-four million, six hundred ninety-nine thousand, six hundred forty-eight".