40159128 has 16 divisors (see below), whose sum is σ = 100397880. Its totient is φ = 13386368.

The previous prime is 40159121. The next prime is 40159129. The reversal of 40159128 is 82195104.

It is a happy number.

It is a super-2 number, since 2×40159128² = 3225511123440768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40159095 and 40159104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40159121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 836625 + ... + 836672.

Almost surely, 2^40159128 is an apocalyptic number.

It is an amenable number.

40159128 is an abundant number, since it is smaller than the sum of its proper divisors (60238752).

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

40159128 is a wasteful number, since it uses less digits than its factorization.

40159128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673306 (or 1673302 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 40159128 is about 6337.1230065385. The cubic root of 40159128 is about 342.4480976993.

The spelling of 40159128 in words is "forty million, one hundred fifty-nine thousand, one hundred twenty-eight".