74742520 has 48 divisors (see below), whose sum is σ = 171708840. Its totient is φ = 29274432.

The previous prime is 74742511. The next prime is 74742601. The reversal of 74742520 is 2524747.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 447477 + ... + 447643.

Almost surely, 2^74742520 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 74742520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85854420).

74742520 is an abundant number, since it is smaller than the sum of its proper divisors (96966320).

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

74742520 is a wasteful number, since it uses less digits than its factorization.

74742520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 31.

The square root of 74742520 is about 8645.3756425039. The cubic root of 74742520 is about 421.2331859085.

The spelling of 74742520 in words is "seventy-four million, seven hundred forty-two thousand, five hundred twenty".