40369685 has 8 divisors (see below), whose sum is σ = 48539736. Its totient is φ = 32231680.

The previous prime is 40369673. The next prime is 40369687. The reversal of 40369685 is 58696304.

It can be written as a sum of positive squares in 4 ways, for example, as 9821956 + 30547729 = 3134^2 + 5527^2 .

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

It is not a de Polignac number, because 40369685 - 2⁸ = 40369429 is a prime.

It is a super-2 number, since 2×40369685² = 3259422933998450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40369687) 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, 5144 + ... + 10353.

It is an arithmetic number, because the mean of its divisors is an integer number (6067467).

Almost surely, 2^40369685 is an apocalyptic number.

It is an amenable number.

40369685 is a deficient number, since it is larger than the sum of its proper divisors (8170051).

40369685 is a wasteful number, since it uses less digits than its factorization.

40369685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16023.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 40369685 is about 6353.7142680483. The cubic root of 40369685 is about 343.0455475331.

The spelling of 40369685 in words is "forty million, three hundred sixty-nine thousand, six hundred eighty-five".