45232640 has 40 divisors (see below), whose sum is σ = 108458460. Its totient is φ = 18092032.

The previous prime is 45232639. The next prime is 45232643. The reversal of 45232640 is 4623254.

It can be written as a sum of positive squares in 2 ways, for example, as 42823936 + 2408704 = 6544^2 + 1552^2 .

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 (45232643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6275 + ... + 11394.

Almost surely, 2^45232640 is an apocalyptic number.

45232640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45232640 is an abundant number, since it is smaller than the sum of its proper divisors (63225820).

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

45232640 is an equidigital number, since it uses as much as digits as its factorization.

45232640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17692 (or 17676 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 45232640 is about 6725.5215411149. The cubic root of 45232640 is about 356.3012221414.

Adding to 45232640 its reverse (4623254), we get a palindrome (49855894).

The spelling of 45232640 in words is "forty-five million, two hundred thirty-two thousand, six hundred forty".