40239699 has 8 divisors (see below), whose sum is σ = 53711760. Its totient is φ = 26797056.

The previous prime is 40239679. The next prime is 40239709. The reversal of 40239699 is 99693204.

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

It is not a de Polignac number, because 40239699 - 2¹⁵ = 40206931 is a prime.

It is a super-2 number, since 2×40239699² = 3238466751221202, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40239699.

It is not an unprimeable number, because it can be changed into a prime (40239679) 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, 3934 + ... + 9795.

It is an arithmetic number, because the mean of its divisors is an integer number (6713970).

Almost surely, 2^40239699 is an apocalyptic number.

40239699 is a deficient number, since it is larger than the sum of its proper divisors (13472061).

40239699 is a wasteful number, since it uses less digits than its factorization.

40239699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14709.

The product of its (nonzero) digits is 104976, while the sum is 42.

The square root of 40239699 is about 6343.4768857465. The cubic root of 40239699 is about 342.6769618493.

The spelling of 40239699 in words is "forty million, two hundred thirty-nine thousand, six hundred ninety-nine".