40045472 has 24 divisors (see below), whose sum is σ = 83478276. Its totient is φ = 18844672.

The previous prime is 40045441. The next prime is 40045487. The reversal of 40045472 is 27454004.

It can be written as a sum of positive squares in 2 ways, for example, as 38887696 + 1157776 = 6236^2 + 1076^2 .

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, 36263 + ... + 37350.

Almost surely, 2^40045472 is an apocalyptic number.

It is an amenable number.

40045472 is an abundant number, since it is smaller than the sum of its proper divisors (43432804).

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

40045472 is a wasteful number, since it uses less digits than its factorization.

40045472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73640 (or 73632 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 40045472 is about 6328.1491764970. The cubic root of 40045472 is about 342.1247336362.

Adding to 40045472 its reverse (27454004), we get a palindrome (67499476).

The spelling of 40045472 in words is "forty million, forty-five thousand, four hundred seventy-two".