45507240 has 96 divisors (see below), whose sum is σ = 149778720. Its totient is φ = 11981184.

The previous prime is 45507229. The next prime is 45507257. The reversal of 45507240 is 4270554.

45507240 is a `hidden beast` number, since 4 + 550 + 72 + 40 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29119 + ... + 30641.

It is an arithmetic number, because the mean of its divisors is an integer number (1560195).

Almost surely, 2^45507240 is an apocalyptic number.

45507240 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 45507240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74889360).

45507240 is an abundant number, since it is smaller than the sum of its proper divisors (104271480).

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

45507240 is a wasteful number, since it uses less digits than its factorization.

45507240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1623 (or 1616 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 45507240 is about 6745.9054247743. The cubic root of 45507240 is about 357.0207835745.

Adding to 45507240 its reverse (4270554), we get a palindrome (49777794).

The spelling of 45507240 in words is "forty-five million, five hundred seven thousand, two hundred forty".