74645436 has 48 divisors (see below), whose sum is σ = 185310720. Its totient is φ = 23304960.

The previous prime is 74645413. The next prime is 74645479. The reversal of 74645436 is 63454647.

It is a happy number.

It is a super-2 number, since 2×74645436² = 11143882231260192, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

Its product of digits (241920) is a multiple of the sum of its prime divisors (1792).

It is a junction number, because it is equal to n+sod(n) for n = 74645394 and 74645403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47991 + ... + 49521.

It is an arithmetic number, because the mean of its divisors is an integer number (3860640).

Almost surely, 2^74645436 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 74645436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92655360).

74645436 is an abundant number, since it is smaller than the sum of its proper divisors (110665284).

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

74645436 is a wasteful number, since it uses less digits than its factorization.

74645436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1794 (or 1792 counting only the distinct ones).

The product of its digits is 241920, while the sum is 39.

The square root of 74645436 is about 8639.7590244173. The cubic root of 74645436 is about 421.0507251898.

The spelling of 74645436 in words is "seventy-four million, six hundred forty-five thousand, four hundred thirty-six".