40170642 has 32 divisors (see below), whose sum is σ = 81734400. Its totient is φ = 13160448.

The previous prime is 40170623. The next prime is 40170649. The reversal of 40170642 is 24607104.

It is a super-2 number, since 2×40170642² = 3227360957384328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40170649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156178 + ... + 156434.

It is an arithmetic number, because the mean of its divisors is an integer number (2554200).

Almost surely, 2^40170642 is an apocalyptic number.

40170642 is an abundant number, since it is smaller than the sum of its proper divisors (41563758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40170642 is a wasteful number, since it uses less digits than its factorization.

40170642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 40170642 is about 6338.0313978396. The cubic root of 40170642 is about 342.4808222697.

Adding to 40170642 its reverse (24607104), we get a palindrome (64777746).

The spelling of 40170642 in words is "forty million, one hundred seventy thousand, six hundred forty-two".