31787274948 has 192 divisors, whose sum is σ = 90084234240. Its totient is φ = 8595878400.

The previous prime is 31787274947. The next prime is 31787274997. The reversal of 31787274948 is 84947278713.

It is a junction number, because it is equal to n+sod(n) for n = 31787274891 and 31787274900.

It is not an unprimeable number, because it can be changed into a prime (31787274947) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6173311 + ... + 6178457.

It is an arithmetic number, because the mean of its divisors is an integer number (469188720).

Almost surely, 2^31787274948 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31787274948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45042117120).

31787274948 is an abundant number, since it is smaller than the sum of its proper divisors (58296959292).

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

31787274948 is a wasteful number, since it uses less digits than its factorization.

31787274948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5298 (or 5296 counting only the distinct ones).

The product of its digits is 18966528, while the sum is 60.

The spelling of 31787274948 in words is "thirty-one billion, seven hundred eighty-seven million, two hundred seventy-four thousand, nine hundred forty-eight".