40106989 has 8 divisors (see below), whose sum is σ = 43380792. Its totient is φ = 36860160.

The previous prime is 40106987. The next prime is 40106993. The reversal of 40106989 is 98960104.

It can be written as a sum of positive squares in 4 ways, for example, as 5978025 + 34128964 = 2445^2 + 5842^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 40106989 - 2¹ = 40106987 is a prime.

It is a super-2 number, since 2×40106989² = 3217141133292242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40106987) 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, 3592 + ... + 9649.

It is an arithmetic number, because the mean of its divisors is an integer number (5422599).

Almost surely, 2^40106989 is an apocalyptic number.

It is an amenable number.

40106989 is a deficient number, since it is larger than the sum of its proper divisors (3273803).

40106989 is a wasteful number, since it uses less digits than its factorization.

40106989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13487.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 40106989 is about 6333.0078951475. The cubic root of 40106989 is about 342.2998322455.

The spelling of 40106989 in words is "forty million, one hundred six thousand, nine hundred eighty-nine".