40279807 has 4 divisors (see below), whose sum is σ = 40295200. Its totient is φ = 40264416.

The previous prime is 40279747. The next prime is 40279823. The reversal of 40279807 is 70897204.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40279807 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40279847) 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, 2682 + ... + 9367.

It is an arithmetic number, because the mean of its divisors is an integer number (10073800).

Almost surely, 2^40279807 is an apocalyptic number.

40279807 is a deficient number, since it is larger than the sum of its proper divisors (15393).

40279807 is a wasteful number, since it uses less digits than its factorization.

40279807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15392.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 40279807 is about 6346.6374561653. The cubic root of 40279807 is about 342.7907758529.

The spelling of 40279807 in words is "forty million, two hundred seventy-nine thousand, eight hundred seven".