31426836870 has 128 divisors (see below), whose sum is σ = 91666391040. Its totient is φ = 6790049280.

The previous prime is 31426836829. The next prime is 31426836877. The reversal of 31426836870 is 7863862413.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31426836877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1894 + ... + 250713.

It is an arithmetic number, because the mean of its divisors is an integer number (716143680).

Almost surely, 2^31426836870 is an apocalyptic number.

31426836870 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31426836870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45833195520).

31426836870 is an abundant number, since it is smaller than the sum of its proper divisors (60239554170).

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

31426836870 is a wasteful number, since it uses less digits than its factorization.

31426836870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252670.

The product of its (nonzero) digits is 1161216, while the sum is 48.

The spelling of 31426836870 in words is "thirty-one billion, four hundred twenty-six million, eight hundred thirty-six thousand, eight hundred seventy".