31472406 has 72 divisors (see below), whose sum is σ = 84029400. Its totient is φ = 8459136.

The previous prime is 31472359. The next prime is 31472437. The reversal of 31472406 is 60427413.

It is a self number, because there is not a number n which added to its sum of digits gives 31472406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 13945 + ... + 16043.

It is an arithmetic number, because the mean of its divisors is an integer number (1167075).

Almost surely, 2^31472406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31472406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42014700).

31472406 is an abundant number, since it is smaller than the sum of its proper divisors (52556994).

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

31472406 is a wasteful number, since it uses less digits than its factorization.

31472406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2138 (or 2128 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 31472406 is about 5610.0272726610. The cubic root of 31472406 is about 315.7257340917.

Adding to 31472406 its reverse (60427413), we get a palindrome (91899819).

It can be divided in two parts, 31472 and 406, that added together give a triangular number (31878 = T₂₅₂).

The spelling of 31472406 in words is "thirty-one million, four hundred seventy-two thousand, four hundred six".