40512140 has 24 divisors (see below), whose sum is σ = 86682960. Its totient is φ = 15898688.

The previous prime is 40512137. The next prime is 40512169. The reversal of 40512140 is 4121504.

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 7 ways as a sum of consecutive naturals, for example, 18050 + ... + 20169.

It is an arithmetic number, because the mean of its divisors is an integer number (3611790).

Almost surely, 2^40512140 is an apocalyptic number.

It is an amenable number.

40512140 is an abundant number, since it is smaller than the sum of its proper divisors (46170820).

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

40512140 is a wasteful number, since it uses less digits than its factorization.

40512140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38281 (or 38279 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 40512140 is about 6364.9147676933. The cubic root of 40512140 is about 343.4485825008.

Adding to 40512140 its reverse (4121504), we get a palindrome (44633644).

The spelling of 40512140 in words is "forty million, five hundred twelve thousand, one hundred forty".