40706139 has 4 divisors (see below), whose sum is σ = 54274856. Its totient is φ = 27137424.

The previous prime is 40706129. The next prime is 40706191. The reversal of 40706139 is 93160704.

It is a happy number.

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

It is not a de Polignac number, because 40706139 - 2⁴ = 40706123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40706129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6784354 + ... + 6784359.

It is an arithmetic number, because the mean of its divisors is an integer number (13568714).

Almost surely, 2^40706139 is an apocalyptic number.

40706139 is a deficient number, since it is larger than the sum of its proper divisors (13568717).

40706139 is a wasteful number, since it uses less digits than its factorization.

40706139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13568716.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 40706139 is about 6380.1362838109. The cubic root of 40706139 is about 343.9959296210.

The spelling of 40706139 in words is "forty million, seven hundred six thousand, one hundred thirty-nine".