40143756 has 48 divisors (see below), whose sum is σ = 96808320. Its totient is φ = 12938880.

The previous prime is 40143731. The next prime is 40143757. The reversal of 40143756 is 65734104.

It is a super-2 number, since 2×40143756² = 3223042291575072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40143757) 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 15 ways as a sum of consecutive naturals, for example, 68095 + ... + 68681.

It is an arithmetic number, because the mean of its divisors is an integer number (2016840).

Almost surely, 2^40143756 is an apocalyptic number.

It is an amenable number.

40143756 is an abundant number, since it is smaller than the sum of its proper divisors (56664564).

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

40143756 is a wasteful number, since it uses less digits than its factorization.

40143756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774 (or 772 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 40143756 is about 6335.9100372401. The cubic root of 40143756 is about 342.4043983444.

The spelling of 40143756 in words is "forty million, one hundred forty-three thousand, seven hundred fifty-six".