40131400 has 24 divisors (see below), whose sum is σ = 93305970. Its totient is φ = 16052480.

The previous prime is 40131397. The next prime is 40131409. The reversal of 40131400 is 413104.

It can be written as a sum of positive squares in 3 ways, for example, as 15984004 + 24147396 = 3998^2 + 4914^2 .

It is a super-2 number, since 2×40131400² = 3221058531920000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40131409) 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 5 ways as a sum of consecutive naturals, for example, 100129 + ... + 100528.

Almost surely, 2^40131400 is an apocalyptic number.

40131400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40131400 is an abundant number, since it is smaller than the sum of its proper divisors (53174570).

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

40131400 is a wasteful number, since it uses less digits than its factorization.

40131400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200673 (or 200664 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 40131400 is about 6334.9348852218. The cubic root of 40131400 is about 342.3692647536.

Adding to 40131400 its reverse (413104), we get a palindrome (40544504).

The spelling of 40131400 in words is "forty million, one hundred thirty-one thousand, four hundred".