45220440 has 32 divisors (see below), whose sum is σ = 135661680. Its totient is φ = 12058752.

The previous prime is 45220433. The next prime is 45220451. The reversal of 45220440 is 4402254.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188299 + ... + 188538.

Almost surely, 2^45220440 is an apocalyptic number.

45220440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45220440 is an abundant number, since it is smaller than the sum of its proper divisors (90441240).

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

45220440 is a wasteful number, since it uses less digits than its factorization.

45220440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376851 (or 376847 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 45220440 is about 6724.6144870914. The cubic root of 45220440 is about 356.2691857934.

Adding to 45220440 its reverse (4402254), we get a palindrome (49622694).

The spelling of 45220440 in words is "forty-five million, two hundred twenty thousand, four hundred forty".