75481820 has 24 divisors (see below), whose sum is σ = 162379728. Its totient is φ = 29456000.

The previous prime is 75481817. The next prime is 75481823. The reversal of 75481820 is 2818457.

It is an interprime number because it is at equal distance from previous prime (75481817) and next prime (75481823).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75481823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45206 + ... + 46845.

It is an arithmetic number, because the mean of its divisors is an integer number (6765822).

Almost surely, 2^75481820 is an apocalyptic number.

It is an amenable number.

75481820 is an abundant number, since it is smaller than the sum of its proper divisors (86897908).

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

75481820 is a wasteful number, since it uses less digits than its factorization.

75481820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92101 (or 92099 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 75481820 is about 8688.0273940636. The cubic root of 75481820 is about 422.6174783897.

The spelling of 75481820 in words is "seventy-five million, four hundred eighty-one thousand, eight hundred twenty".