45040020 has 24 divisors (see below), whose sum is σ = 126112224. Its totient is φ = 12010656.

The previous prime is 45040001. The next prime is 45040081. The reversal of 45040020 is 2004054.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent 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, 375274 + ... + 375393.

It is an arithmetic number, because the mean of its divisors is an integer number (5254676).

Almost surely, 2^45040020 is an apocalyptic number.

It is an amenable number.

45040020 is an abundant number, since it is smaller than the sum of its proper divisors (81072204).

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

45040020 is a wasteful number, since it uses less digits than its factorization.

45040020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750679 (or 750677 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 45040020 is about 6711.1861842747. The cubic root of 45040020 is about 355.7947413327.

Adding to 45040020 its reverse (2004054), we get a palindrome (47044074).

It can be divided in two parts, 450 and 40020, that added together give a triangular number (40470 = T₂₈₄).

The spelling of 45040020 in words is "forty-five million, forty thousand, twenty".