45212440 has 64 divisors (see below), whose sum is σ = 125213760. Its totient is φ = 14307840.

The previous prime is 45212429. The next prime is 45212441. The reversal of 45212440 is 4421254.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45212441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2571 + ... + 9850.

It is an arithmetic number, because the mean of its divisors is an integer number (1956465).

Almost surely, 2^45212440 is an apocalyptic number.

45212440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45212440 is an abundant number, since it is smaller than the sum of its proper divisors (80001320).

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

45212440 is a wasteful number, since it uses less digits than its factorization.

45212440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12452 (or 12448 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 45212440 is about 6724.0196311433. The cubic root of 45212440 is about 356.2481752241.

Adding to 45212440 its reverse (4421254), we get a palindrome (49633694).

The spelling of 45212440 in words is "forty-five million, two hundred twelve thousand, four hundred forty".