40170740 has 36 divisors (see below), whose sum is σ = 85961316. Its totient is φ = 15768576.

The previous prime is 40170727. The next prime is 40170743. The reversal of 40170740 is 4707104.

It can be written as a sum of positive squares in 2 ways, for example, as 30758116 + 9412624 = 5546^2 + 3068^2 .

It is a super-2 number, since 2×40170740² = 3227376704295200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40170743) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69332 + ... + 69908.

Almost surely, 2^40170740 is an apocalyptic number.

It is an amenable number.

40170740 is an abundant number, since it is smaller than the sum of its proper divisors (45790576).

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

40170740 is a wasteful number, since it uses less digits than its factorization.

40170740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704 (or 643 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 40170740 is about 6338.0391289420. The cubic root of 40170740 is about 342.4811007740.

Adding to 40170740 its reverse (4707104), we get a palindrome (44877844).

The spelling of 40170740 in words is "forty million, one hundred seventy thousand, seven hundred forty".