40579143 has 16 divisors (see below), whose sum is σ = 60398976. Its totient is φ = 24020640.

The previous prime is 40579139. The next prime is 40579157. The reversal of 40579143 is 34197504.

It is not a de Polignac number, because 40579143 - 2² = 40579139 is a prime.

It is a super-2 number, since 2×40579143² = 3293333693228898, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40579103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12880 + ... + 15717.

It is an arithmetic number, because the mean of its divisors is an integer number (3774936).

Almost surely, 2^40579143 is an apocalyptic number.

40579143 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

40579143 is a deficient number, since it is larger than the sum of its proper divisors (19819833).

40579143 is a wasteful number, since it uses less digits than its factorization.

40579143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28654.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 40579143 is about 6370.1760572217. The cubic root of 40579143 is about 343.6378213352.

The spelling of 40579143 in words is "forty million, five hundred seventy-nine thousand, one hundred forty-three".