45243440 has 40 divisors (see below), whose sum is σ = 114756048. Its totient is φ = 16451840.

The previous prime is 45243437. The next prime is 45243449. The reversal of 45243440 is 4434254.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (45243449) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 24827 + ... + 26586.

Almost surely, 2^45243440 is an apocalyptic number.

45243440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45243440 is an abundant number, since it is smaller than the sum of its proper divisors (69512608).

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

45243440 is a wasteful number, since it uses less digits than its factorization.

45243440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51437 (or 51431 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 26.

The square root of 45243440 is about 6726.3244049035. The cubic root of 45243440 is about 356.3295773806.

Adding to 45243440 its reverse (4434254), we get a palindrome (49677694).

The spelling of 45243440 in words is "forty-five million, two hundred forty-three thousand, four hundred forty".