31196280 has 128 divisors (see below), whose sum is σ = 99532800. Its totient is φ = 7805952.

The previous prime is 31196227. The next prime is 31196281. The reversal of 31196280 is 8269113.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31196281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 245577 + ... + 245703.

It is an arithmetic number, because the mean of its divisors is an integer number (777600).

Almost surely, 2^31196280 is an apocalyptic number.

31196280 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 31196280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49766400).

31196280 is an abundant number, since it is smaller than the sum of its proper divisors (68336520).

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

31196280 is a wasteful number, since it uses less digits than its factorization.

31196280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 31196280 is about 5585.3630141648. The cubic root of 31196280 is about 314.7996710627.

The spelling of 31196280 in words is "thirty-one million, one hundred ninety-six thousand, two hundred eighty".