31096380 has 96 divisors (see below), whose sum is σ = 101606400. Its totient is φ = 7103040.

The previous prime is 31096309. The next prime is 31096423. The reversal of 31096380 is 8369013.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19825 + ... + 21335.

It is an arithmetic number, because the mean of its divisors is an integer number (1058400).

Almost surely, 2^31096380 is an apocalyptic number.

31096380 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31096380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50803200).

31096380 is an abundant number, since it is smaller than the sum of its proper divisors (70510020).

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

31096380 is a wasteful number, since it uses less digits than its factorization.

31096380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544 (or 1528 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 31096380 is about 5576.4128254641. The cubic root of 31096380 is about 314.4632835597.

The spelling of 31096380 in words is "thirty-one million, ninety-six thousand, three hundred eighty".