45043720 has 16 divisors (see below), whose sum is σ = 101348460. Its totient is φ = 18017472.

The previous prime is 45043709. The next prime is 45043759. The reversal of 45043720 is 2734054.

It can be written as a sum of positive squares in 2 ways, for example, as 38962564 + 6081156 = 6242^2 + 2466^2 .

It is a super-2 number, since 2×45043720² = 4057873422876800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 563007 + ... + 563086.

Almost surely, 2^45043720 is an apocalyptic number.

45043720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45043720 is an abundant number, since it is smaller than the sum of its proper divisors (56304740).

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

45043720 is a wasteful number, since it uses less digits than its factorization.

45043720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126104 (or 1126100 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 45043720 is about 6711.4618377817. The cubic root of 45043720 is about 355.8044838128.

Adding to 45043720 its reverse (2734054), we get a palindrome (47777774).

The spelling of 45043720 in words is "forty-five million, forty-three thousand, seven hundred twenty".