31738230 has 96 divisors (see below), whose sum is σ = 88137504. Its totient is φ = 8211456.

The previous prime is 31738211. The next prime is 31738241. The reversal of 31738230 is 3283713.

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 = 31738194 and 31738203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 89734 + ... + 90086.

It is an arithmetic number, because the mean of its divisors is an integer number (918099).

Almost surely, 2^31738230 is an apocalyptic number.

31738230 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31738230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44068752).

31738230 is an abundant number, since it is smaller than the sum of its proper divisors (56399274).

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

31738230 is a wasteful number, since it uses less digits than its factorization.

31738230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 31738230 is about 5633.6693193690. The cubic root of 31738230 is about 316.6121432751.

The spelling of 31738230 in words is "thirty-one million, seven hundred thirty-eight thousand, two hundred thirty".