45213440 has 36 divisors (see below), whose sum is σ = 108303384. Its totient is φ = 18084864.

The previous prime is 45213437. The next prime is 45213451. The reversal of 45213440 is 4431254.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16382 + ... + 18941.

Almost surely, 2^45213440 is an apocalyptic number.

45213440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45213440 is an abundant number, since it is smaller than the sum of its proper divisors (63089944).

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

45213440 is an equidigital number, since it uses as much as digits as its factorization.

45213440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35344 (or 35330 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 45213440 is about 6724.0939910147. The cubic root of 45213440 is about 356.2508016808.

Adding to 45213440 its reverse (4431254), we get a palindrome (49644694).

The spelling of 45213440 in words is "forty-five million, two hundred thirteen thousand, four hundred forty".