45091520 has 112 divisors (see below), whose sum is σ = 114665760. Its totient is φ = 16859136.

The previous prime is 45091511. The next prime is 45091537. The reversal of 45091520 is 2519054.

It is a self number, because there is not a number n which added to its sum of digits gives 45091520.

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, 398984 + ... + 399096.

Almost surely, 2^45091520 is an apocalyptic number.

45091520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45091520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57332880).

45091520 is an abundant number, since it is smaller than the sum of its proper divisors (69574240).

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

45091520 is a wasteful number, since it uses less digits than its factorization.

45091520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 192 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 45091520 is about 6715.0219657124. The cubic root of 45091520 is about 355.9302981832.

The spelling of 45091520 in words is "forty-five million, ninety-one thousand, five hundred twenty".