40572440 has 32 divisors (see below), whose sum is σ = 91476000. Its totient is φ = 16195584.

The previous prime is 40572439. The next prime is 40572443. The reversal of 40572440 is 4427504.

It is a super-2 number, since 2×40572440² = 3292245775107200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40572443) 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 7 ways as a sum of consecutive naturals, for example, 30101 + ... + 31419.

It is an arithmetic number, because the mean of its divisors is an integer number (2858625).

Almost surely, 2^40572440 is an apocalyptic number.

40572440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40572440 is an abundant number, since it is smaller than the sum of its proper divisors (50903560).

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

40572440 is a wasteful number, since it uses less digits than its factorization.

40572440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2099 (or 2095 counting only the distinct ones).

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

The square root of 40572440 is about 6369.6499118868. The cubic root of 40572440 is about 343.6188992077.

Adding to 40572440 its reverse (4427504), we get a palindrome (44999944).

The spelling of 40572440 in words is "forty million, five hundred seventy-two thousand, four hundred forty".