45007640 has 32 divisors (see below), whose sum is σ = 101461680. Its totient is φ = 17968512.

The previous prime is 45007621. The next prime is 45007649. The reversal of 45007640 is 4670054.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45007649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34439 + ... + 35721.

Almost surely, 2^45007640 is an apocalyptic number.

45007640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45007640 is an abundant number, since it is smaller than the sum of its proper divisors (56454040).

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

45007640 is a wasteful number, since it uses less digits than its factorization.

45007640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2171 (or 2167 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 45007640 is about 6708.7733603096. The cubic root of 45007640 is about 355.7094586913.

Adding to 45007640 its reverse (4670054), we get a palindrome (49677694).

The spelling of 45007640 in words is "forty-five million, seven thousand, six hundred forty".