40142988 has 36 divisors (see below), whose sum is σ = 102110008. Its totient is φ = 13296960.

The previous prime is 40142987. The next prime is 40143007. The reversal of 40142988 is 88924104.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×40142988³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (40142987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2448 + ... + 9288.

Almost surely, 2^40142988 is an apocalyptic number.

It is an amenable number.

40142988 is an abundant number, since it is smaller than the sum of its proper divisors (61967020).

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

40142988 is a wasteful number, since it uses less digits than its factorization.

40142988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7014 (or 7009 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 40142988 is about 6335.8494300291. The cubic root of 40142988 is about 342.4022147897.

The spelling of 40142988 in words is "forty million, one hundred forty-two thousand, nine hundred eighty-eight".