45312440 has 16 divisors (see below), whose sum is σ = 101953080. Its totient is φ = 18124960.

The previous prime is 45312437. The next prime is 45312469. The reversal of 45312440 is 4421354.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 566366 + ... + 566445.

Almost surely, 2^45312440 is an apocalyptic number.

45312440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45312440 is an abundant number, since it is smaller than the sum of its proper divisors (56640640).

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

45312440 is a wasteful number, since it uses less digits than its factorization.

45312440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132822 (or 1132818 counting only the distinct ones).

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

The square root of 45312440 is about 6731.4515522285. The cubic root of 45312440 is about 356.5106294290.

Adding to 45312440 its reverse (4421354), we get a palindrome (49733794).

The spelling of 45312440 in words is "forty-five million, three hundred twelve thousand, four hundred forty".