40697808 has 20 divisors (see below), whose sum is σ = 105136128. Its totient is φ = 13565920.

The previous prime is 40697801. The next prime is 40697819. The reversal of 40697808 is 80879604.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 40697808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40697801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423888 + ... + 423983.

Almost surely, 2^40697808 is an apocalyptic number.

40697808 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

40697808 is an abundant number, since it is smaller than the sum of its proper divisors (64438320).

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

40697808 is a wasteful number, since it uses less digits than its factorization.

40697808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847882 (or 847876 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 40697808 is about 6379.4833646621. The cubic root of 40697808 is about 343.9724603877.

The spelling of 40697808 in words is "forty million, six hundred ninety-seven thousand, eight hundred eight".