40423072 has 24 divisors (see below), whose sum is σ = 79743636. Its totient is φ = 20170752.

The previous prime is 40423067. The next prime is 40423073. The reversal of 40423072 is 27032404.

It can be written as a sum of positive squares in 2 ways, for example, as 40398736 + 24336 = 6356^2 + 156^2 .

It is not an unprimeable number, because it can be changed into a prime (40423073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20598 + ... + 22474.

Almost surely, 2^40423072 is an apocalyptic number.

It is an amenable number.

40423072 is a deficient number, since it is larger than the sum of its proper divisors (39320564).

40423072 is a wasteful number, since it uses less digits than its factorization.

40423072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2560 (or 2552 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 40423072 is about 6357.9141233584. The cubic root of 40423072 is about 343.1967014279.

Adding to 40423072 its reverse (27032404), we get a palindrome (67455476).

The spelling of 40423072 in words is "forty million, four hundred twenty-three thousand, seventy-two".