31228470294 has 64 divisors (see below), whose sum is σ = 74555458560. Its totient is φ = 8526165120.

The previous prime is 31228470293. The next prime is 31228470311. The reversal of 31228470294 is 49207482213.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31228470293) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1009692 + ... + 1040160.

It is an arithmetic number, because the mean of its divisors is an integer number (1164929040).

Almost surely, 2^31228470294 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31228470294, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37277729280).

31228470294 is an abundant number, since it is smaller than the sum of its proper divisors (43326988266).

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

31228470294 is a wasteful number, since it uses less digits than its factorization.

31228470294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31565.

The product of its (nonzero) digits is 193536, while the sum is 42.

The spelling of 31228470294 in words is "thirty-one billion, two hundred twenty-eight million, four hundred seventy thousand, two hundred ninety-four".