40142788 has 24 divisors (see below), whose sum is σ = 80427200. Its totient is φ = 17173728.

The previous prime is 40142777. The next prime is 40142789. The reversal of 40142788 is 88724104.

It is a super-2 number, since 2×40142788² = 3222886856825888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40142789) 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 7 ways as a sum of consecutive naturals, for example, 23218 + ... + 24886.

Almost surely, 2^40142788 is an apocalyptic number.

It is an amenable number.

40142788 is an abundant number, since it is smaller than the sum of its proper divisors (40284412).

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

40142788 is a wasteful number, since it uses less digits than its factorization.

40142788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2539 (or 2537 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 40142788 is about 6335.8336468061. The cubic root of 40142788 is about 342.4016461511.

The spelling of 40142788 in words is "forty million, one hundred forty-two thousand, seven hundred eighty-eight".