40129740 has 72 divisors (see below), whose sum is σ = 139120800. Its totient is φ = 9172224.

The previous prime is 40129711. The next prime is 40129759. The reversal of 40129740 is 4792104.

It is a happy number.

It is a super-2 number, since 2×40129740² = 3220792064935200, which contains 22 as substring.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 14665 + ... + 17184.

Almost surely, 2^40129740 is an apocalyptic number.

It is an amenable number.

40129740 is an abundant number, since it is smaller than the sum of its proper divisors (98991060).

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

40129740 is a wasteful number, since it uses less digits than its factorization.

40129740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31871 (or 31866 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 40129740 is about 6334.8038643671. The cubic root of 40129740 is about 342.3645440875.

The spelling of 40129740 in words is "forty million, one hundred twenty-nine thousand, seven hundred forty".