40090689 has 6 divisors (see below), whose sum is σ = 57908786. Its totient is φ = 26727120.

The previous prime is 40090681. The next prime is 40090693. The reversal of 40090689 is 98609004.

It can be written as a sum of positive squares in only one way, i.e., 39690000 + 400689 = 6300^2 + 633^2 .

It is not a de Polignac number, because 40090689 - 2³ = 40090681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40090681) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2227252 + ... + 2227269.

Almost surely, 2^40090689 is an apocalyptic number.

It is an amenable number.

40090689 is a deficient number, since it is larger than the sum of its proper divisors (17818097).

40090689 is a wasteful number, since it uses less digits than its factorization.

40090689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4454527 (or 4454524 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 40090689 is about 6331.7208561338. The cubic root of 40090689 is about 342.2534542664.

The spelling of 40090689 in words is "forty million, ninety thousand, six hundred eighty-nine".