45787220 has 24 divisors (see below), whose sum is σ = 96318600. Its totient is φ = 18283392.

The previous prime is 45787213. The next prime is 45787229. The reversal of 45787220 is 2278754.

It can be written as a sum of positive squares in 4 ways, for example, as 8464 + 45778756 = 92^2 + 6766^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45787229) 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, 12566 + ... + 15794.

It is an arithmetic number, because the mean of its divisors is an integer number (4013275).

Almost surely, 2^45787220 is an apocalyptic number.

It is an amenable number.

45787220 is an abundant number, since it is smaller than the sum of its proper divisors (50531380).

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

45787220 is a wasteful number, since it uses less digits than its factorization.

45787220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3947 (or 3945 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 35.

The square root of 45787220 is about 6766.6254514344. The cubic root of 45787220 is about 357.7514686305.

The spelling of 45787220 in words is "forty-five million, seven hundred eighty-seven thousand, two hundred twenty".