26287631988 has 24 divisors (see below), whose sum is σ = 61594458240. Its totient is φ = 8725879680.

The previous prime is 26287631987. The next prime is 26287631989. The reversal of 26287631988 is 88913678262.

It is an interprime number because it is at equal distance from previous prime (26287631987) and next prime (26287631989).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26287631987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4580053 + ... + 4585788.

It is an arithmetic number, because the mean of its divisors is an integer number (2566435760).

Almost surely, 2^26287631988 is an apocalyptic number.

It is an amenable number.

26287631988 is an abundant number, since it is smaller than the sum of its proper divisors (35306826252).

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

26287631988 is a wasteful number, since it uses less digits than its factorization.

26287631988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9166087 (or 9166085 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 60.

The spelling of 26287631988 in words is "twenty-six billion, two hundred eighty-seven million, six hundred thirty-one thousand, nine hundred eighty-eight".