40978131988 has 12 divisors (see below), whose sum is σ = 71713938240. Its totient is φ = 20488435352.

The previous prime is 40978131983. The next prime is 40978132021. The reversal of 40978131988 is 88913187904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40978131983) 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, 7845 + ... + 286387.

It is an arithmetic number, because the mean of its divisors is an integer number (5976161520).

Almost surely, 2^40978131988 is an apocalyptic number.

It is an amenable number.

40978131988 is a deficient number, since it is larger than the sum of its proper divisors (30735806252).

40978131988 is a wasteful number, since it uses less digits than its factorization.

40978131988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315326 (or 315324 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 58.

The spelling of 40978131988 in words is "forty billion, nine hundred seventy-eight million, one hundred thirty-one thousand, nine hundred eighty-eight".