40010639 has 8 divisors (see below), whose sum is σ = 44206560. Its totient is φ = 36019456.

The previous prime is 40010627. The next prime is 40010647. The reversal of 40010639 is 93601004.

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

It is a cyclic number.

It is not a de Polignac number, because 40010639 - 2⁴ = 40010623 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40010609) 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, 50774 + ... + 51555.

It is an arithmetic number, because the mean of its divisors is an integer number (5525820).

Almost surely, 2^40010639 is an apocalyptic number.

40010639 is a deficient number, since it is larger than the sum of its proper divisors (4195921).

40010639 is a wasteful number, since it uses less digits than its factorization.

40010639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102369.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 40010639 is about 6325.3963512178. The cubic root of 40010639 is about 342.0255073710.

The spelling of 40010639 in words is "forty million, ten thousand, six hundred thirty-nine".