40139873 has 8 divisors (see below), whose sum is σ = 42900192. Its totient is φ = 37423936.

The previous prime is 40139863. The next prime is 40139887. The reversal of 40139873 is 37893104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40139873 - 2⁶ = 40139809 is a prime.

It is a super-2 number, since 2×40139873² = 3222418808912258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40139843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9215 + ... + 12852.

It is an arithmetic number, because the mean of its divisors is an integer number (5362524).

Almost surely, 2^40139873 is an apocalyptic number.

It is an amenable number.

40139873 is a deficient number, since it is larger than the sum of its proper divisors (2760319).

40139873 is a wasteful number, since it uses less digits than its factorization.

40139873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22191.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 40139873 is about 6335.6036018678. The cubic root of 40139873 is about 342.3933580293.

The spelling of 40139873 in words is "forty million, one hundred thirty-nine thousand, eight hundred seventy-three".