40132639 has 4 divisors (see below), whose sum is σ = 40152024. Its totient is φ = 40113256.

The previous prime is 40132633. The next prime is 40132649. The reversal of 40132639 is 93623104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40132639 - 2⁷ = 40132511 is a prime.

It is a super-2 number, since 2×40132639² = 3221257426208642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40132633) 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 3 ways as a sum of consecutive naturals, for example, 6157 + ... + 10870.

It is an arithmetic number, because the mean of its divisors is an integer number (10038006).

Almost surely, 2^40132639 is an apocalyptic number.

40132639 is a deficient number, since it is larger than the sum of its proper divisors (19385).

40132639 is a wasteful number, since it uses less digits than its factorization.

40132639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19384.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 40132639 is about 6335.0326755274. The cubic root of 40132639 is about 342.3727881057.

The spelling of 40132639 in words is "forty million, one hundred thirty-two thousand, six hundred thirty-nine".