40143672 has 24 divisors (see below), whose sum is σ = 108722640. Its totient is φ = 13381200.

The previous prime is 40143661. The next prime is 40143679. The reversal of 40143672 is 27634104.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×40143672² = 3223028803287168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40143679) 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, 278704 + ... + 278847.

It is an arithmetic number, because the mean of its divisors is an integer number (4530110).

Almost surely, 2^40143672 is an apocalyptic number.

It is an amenable number.

40143672 is an abundant number, since it is smaller than the sum of its proper divisors (68578968).

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

40143672 is a wasteful number, since it uses less digits than its factorization.

40143672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557563 (or 557556 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 40143672 is about 6335.9034083546. The cubic root of 40143672 is about 342.4041595194.

Adding to 40143672 its reverse (27634104), we get a palindrome (67777776).

The spelling of 40143672 in words is "forty million, one hundred forty-three thousand, six hundred seventy-two".