40159959 has 24 divisors (see below), whose sum is σ = 62613360. Its totient is φ = 22829184.

The previous prime is 40159957. The next prime is 40159961. The reversal of 40159959 is 95995104.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (40159957) and next prime (40159961).

It is not a de Polignac number, because 40159959 - 2¹ = 40159957 is a prime.

It is a super-2 number, since 2×40159959² = 3225644613763362, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40159959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40159957) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33067 + ... + 34259.

It is an arithmetic number, because the mean of its divisors is an integer number (2608890).

Almost surely, 2^40159959 is an apocalyptic number.

40159959 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

40159959 is a deficient number, since it is larger than the sum of its proper divisors (22453401).

40159959 is a wasteful number, since it uses less digits than its factorization.

40159959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439 (or 1432 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 42.

The square root of 40159959 is about 6337.1885722298. The cubic root of 40159959 is about 342.4504597393.

The spelling of 40159959 in words is "forty million, one hundred fifty-nine thousand, nine hundred fifty-nine".