74699520 has 216 divisors, whose sum is σ = 278221104. Its totient is φ = 17031168.

The previous prime is 74699519. The next prime is 74699533. The reversal of 74699520 is 2599647.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 187962 + ... + 188358.

Almost surely, 2^74699520 is an apocalyptic number.

74699520 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74699520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139110552).

74699520 is an abundant number, since it is smaller than the sum of its proper divisors (203521584).

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

74699520 is a wasteful number, since it uses less digits than its factorization.

74699520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435 (or 414 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 74699520 is about 8642.8884060828. Note that the first 3 decimals coincide. The cubic root of 74699520 is about 421.1523907484.

The spelling of 74699520 in words is "seventy-four million, six hundred ninety-nine thousand, five hundred twenty".