31406622 has 48 divisors (see below), whose sum is σ = 69569280. Its totient is φ = 9443616.

The previous prime is 31406611. The next prime is 31406629. The reversal of 31406622 is 22660413.

It is a junction number, because it is equal to n+sod(n) for n = 31406592 and 31406601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31406629) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47329 + ... + 47987.

It is an arithmetic number, because the mean of its divisors is an integer number (1449360).

Almost surely, 2^31406622 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31406622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34784640).

31406622 is an abundant number, since it is smaller than the sum of its proper divisors (38162658).

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

31406622 is a wasteful number, since it uses less digits than its factorization.

31406622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737 (or 724 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 31406622 is about 5604.1611325871. The cubic root of 31406622 is about 315.5056027429.

The spelling of 31406622 in words is "thirty-one million, four hundred six thousand, six hundred twenty-two".