45451240 has 32 divisors (see below), whose sum is σ = 104004000. Its totient is φ = 17871424.

The previous prime is 45451213. The next prime is 45451261. The reversal of 45451240 is 4215454.

It is a happy 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, 7270 + ... + 11989.

It is an arithmetic number, because the mean of its divisors is an integer number (3250125).

Almost surely, 2^45451240 is an apocalyptic number.

45451240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45451240 is an abundant number, since it is smaller than the sum of its proper divisors (58552760).

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

45451240 is a wasteful number, since it uses less digits than its factorization.

45451240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19329 (or 19325 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 45451240 is about 6741.7534811056. The cubic root of 45451240 is about 356.8742766999.

Adding to 45451240 its reverse (4215454), we get a palindrome (49666694).

The spelling of 45451240 in words is "forty-five million, four hundred fifty-one thousand, two hundred forty".