40118997 has 32 divisors (see below), whose sum is σ = 58752000. Its totient is φ = 24254208.

The previous prime is 40118993. The next prime is 40118999. The reversal of 40118997 is 79981104.

It is a happy number.

It is not a de Polignac number, because 40118997 - 2² = 40118993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40118993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 201504 + ... + 201702.

It is an arithmetic number, because the mean of its divisors is an integer number (1836000).

Almost surely, 2^40118997 is an apocalyptic number.

It is an amenable number.

40118997 is a deficient number, since it is larger than the sum of its proper divisors (18633003).

40118997 is a wasteful number, since it uses less digits than its factorization.

40118997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 40118997 is about 6333.9558729123. The cubic root of 40118997 is about 342.3339902675. Note that the first 3 decimals are identical.

The spelling of 40118997 in words is "forty million, one hundred eighteen thousand, nine hundred ninety-seven".