45307440 has 60 divisors (see below), whose sum is σ = 152159904. Its totient is φ = 12081792.

The previous prime is 45307433. The next prime is 45307441. The reversal of 45307440 is 4470354.

It is a tau number, because it is divible by the number of its divisors (60).

It is not an unprimeable number, because it can be changed into a prime (45307441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30744 + ... + 32183.

Almost surely, 2^45307440 is an apocalyptic number.

45307440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45307440 is an abundant number, since it is smaller than the sum of its proper divisors (106852464).

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

45307440 is a wasteful number, since it uses less digits than its factorization.

45307440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62946 (or 62937 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 45307440 is about 6731.0801510605. The cubic root of 45307440 is about 356.4975158947.

Adding to 45307440 its reverse (4470354), we get a palindrome (49777794).

The spelling of 45307440 in words is "forty-five million, three hundred seven thousand, four hundred forty".