31226439000 has 128 divisors (see below), whose sum is σ = 98799367680. Its totient is φ = 8209712000.

The previous prime is 31226438989. The next prime is 31226439017. The reversal of 31226439000 is 93462213.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139699 + ... + 286301.

It is an arithmetic number, because the mean of its divisors is an integer number (771870060).

Almost surely, 2^31226439000 is an apocalyptic number.

31226439000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31226439000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49399683840).

31226439000 is an abundant number, since it is smaller than the sum of its proper divisors (67572928680).

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

31226439000 is a wasteful number, since it uses less digits than its factorization.

31226439000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146698 (or 146684 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 30.

The spelling of 31226439000 in words is "thirty-one billion, two hundred twenty-six million, four hundred thirty-nine thousand".