40208868690 has 32 divisors (see below), whose sum is σ = 102177832320. Its totient is φ = 10091637504.

The previous prime is 40208868631. The next prime is 40208868701. The reversal of 40208868690 is 9686880204.

It is a happy number.

It is a super-2 number, since 2×40208868690² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39419950 + ... + 39420969.

It is an arithmetic number, because the mean of its divisors is an integer number (3193057260).

Almost surely, 2^40208868690 is an apocalyptic number.

40208868690 is an abundant number, since it is smaller than the sum of its proper divisors (61968963630).

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

40208868690 is a wasteful number, since it uses less digits than its factorization.

40208868690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78840946.

The product of its (nonzero) digits is 1327104, while the sum is 51.

The spelling of 40208868690 in words is "forty billion, two hundred eight million, eight hundred sixty-eight thousand, six hundred ninety".