40208861 has 16 divisors (see below), whose sum is σ = 51158400. Its totient is φ = 31328640.

The previous prime is 40208843. The next prime is 40208863. The reversal of 40208861 is 16880204.

It is not a de Polignac number, because 40208861 - 2⁶ = 40208797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40208863) 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, 1556 + ... + 9101.

It is an arithmetic number, because the mean of its divisors is an integer number (3197400).

Almost surely, 2^40208861 is an apocalyptic number.

It is an amenable number.

40208861 is a deficient number, since it is larger than the sum of its proper divisors (10949539).

40208861 is a wasteful number, since it uses less digits than its factorization.

40208861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10689 (or 10675 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 40208861 is about 6341.0457339464. The cubic root of 40208861 is about 342.5894017776.

The spelling of 40208861 in words is "forty million, two hundred eight thousand, eight hundred sixty-one".