40309885 has 16 divisors (see below), whose sum is σ = 60308352. Its totient is φ = 25128000.

The previous prime is 40309883. The next prime is 40309891. The reversal of 40309885 is 58890304.

It is not a de Polignac number, because 40309885 - 2¹ = 40309883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40309883) 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, 51966 + ... + 52735.

It is an arithmetic number, because the mean of its divisors is an integer number (3769272).

Almost surely, 2^40309885 is an apocalyptic number.

It is an amenable number.

40309885 is a deficient number, since it is larger than the sum of its proper divisors (19998467).

40309885 is a wasteful number, since it uses less digits than its factorization.

40309885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104724.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 40309885 is about 6349.0066152115. The cubic root of 40309885 is about 342.8760782780.

The spelling of 40309885 in words is "forty million, three hundred nine thousand, eight hundred eighty-five".