45261820 has 48 divisors (see below), whose sum is σ = 101243520. Its totient is φ = 16937984.

The previous prime is 45261793. The next prime is 45261833. The reversal of 45261820 is 2816254.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80982 + ... + 81538.

It is an arithmetic number, because the mean of its divisors is an integer number (2109240).

Almost surely, 2^45261820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45261820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50621760).

45261820 is an abundant number, since it is smaller than the sum of its proper divisors (55981700).

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

45261820 is a wasteful number, since it uses less digits than its factorization.

45261820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 45261820 is about 6727.6905398510. The cubic root of 45261820 is about 356.3778234243.

The spelling of 45261820 in words is "forty-five million, two hundred sixty-one thousand, eight hundred twenty".