45681820 has 24 divisors (see below), whose sum is σ = 96125904. Its totient is φ = 18235776.

The previous prime is 45681809. The next prime is 45681821. The reversal of 45681820 is 2818654.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45681821) 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, 9232 + ... + 13288.

It is an arithmetic number, because the mean of its divisors is an integer number (4005246).

Almost surely, 2^45681820 is an apocalyptic number.

It is an amenable number.

45681820 is an abundant number, since it is smaller than the sum of its proper divisors (50444084).

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

45681820 is a wasteful number, since it uses less digits than its factorization.

45681820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4629 (or 4627 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 45681820 is about 6758.8327394603. The cubic root of 45681820 is about 357.4767487771.

The spelling of 45681820 in words is "forty-five million, six hundred eighty-one thousand, eight hundred twenty".