45140640 has 96 divisors (see below), whose sum is σ = 143337600. Its totient is φ = 11940864.

The previous prime is 45140639. The next prime is 45140657. The reversal of 45140640 is 4604154.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 45140640.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75061 + ... + 75659.

It is an arithmetic number, because the mean of its divisors is an integer number (1493100).

Almost surely, 2^45140640 is an apocalyptic number.

45140640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45140640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71668800).

45140640 is an abundant number, since it is smaller than the sum of its proper divisors (98196960).

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

45140640 is a wasteful number, since it uses less digits than its factorization.

45140640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774 (or 766 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 45140640 is about 6718.6784414794. The cubic root of 45140640 is about 356.0594943282.

Adding to 45140640 its reverse (4604154), we get a palindrome (49744794).

The spelling of 45140640 in words is "forty-five million, one hundred forty thousand, six hundred forty".