75494820 has 48 divisors (see below), whose sum is σ = 214861248. Its totient is φ = 19800960.

The previous prime is 75494819. The next prime is 75494821. The reversal of 75494820 is 2849457.

It is an interprime number because it is at equal distance from previous prime (75494819) and next prime (75494821).

It is not an unprimeable number, because it can be changed into a prime (75494821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6654 + ... + 13973.

It is an arithmetic number, because the mean of its divisors is an integer number (4476276).

Almost surely, 2^75494820 is an apocalyptic number.

It is an amenable number.

75494820 is an abundant number, since it is smaller than the sum of its proper divisors (139366428).

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

75494820 is a wasteful number, since it uses less digits than its factorization.

75494820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20700 (or 20698 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 75494820 is about 8688.7755178736. The cubic root of 75494820 is about 422.6417390299.

The spelling of 75494820 in words is "seventy-five million, four hundred ninety-four thousand, eight hundred twenty".