31734990 has 160 divisors (see below), whose sum is σ = 101407680. Its totient is φ = 6967296.

The previous prime is 31734977. The next prime is 31734991. The reversal of 31734990 is 9943713.

It is a super-3 number, since 3×31734990³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31734991) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 164334 + ... + 164526.

It is an arithmetic number, because the mean of its divisors is an integer number (633798).

Almost surely, 2^31734990 is an apocalyptic number.

31734990 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 31734990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50703840).

31734990 is an abundant number, since it is smaller than the sum of its proper divisors (69672690).

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

31734990 is a wasteful number, since it uses less digits than its factorization.

31734990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 31734990 is about 5633.3817552160. The cubic root of 31734990 is about 316.6013691156.

The spelling of 31734990 in words is "thirty-one million, seven hundred thirty-four thousand, nine hundred ninety".