31346028 has 144 divisors (see below), whose sum is σ = 99800064. Its totient is φ = 8398080.

The previous prime is 31346027. The next prime is 31346083. The reversal of 31346028 is 82064313.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 31345992 and 31346010.

It is not an unprimeable number, because it can be changed into a prime (31346027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 115533 + ... + 115803.

It is an arithmetic number, because the mean of its divisors is an integer number (693056).

Almost surely, 2^31346028 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 31346028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49900032).

31346028 is an abundant number, since it is smaller than the sum of its proper divisors (68454036).

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

31346028 is a wasteful number, since it uses less digits than its factorization.

31346028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 31346028 is about 5598.7523610176. The cubic root of 31346028 is about 315.3025664262.

The spelling of 31346028 in words is "thirty-one million, three hundred forty-six thousand, twenty-eight".