31980450 has 24 divisors (see below), whose sum is σ = 79311888. Its totient is φ = 8528080.

The previous prime is 31980427. The next prime is 31980457. The reversal of 31980450 is 5408913.

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

It is not an unprimeable number, because it can be changed into a prime (31980457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106452 + ... + 106751.

It is an arithmetic number, because the mean of its divisors is an integer number (3304662).

Almost surely, 2^31980450 is an apocalyptic number.

31980450 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31980450 is an abundant number, since it is smaller than the sum of its proper divisors (47331438).

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

31980450 is a wasteful number, since it uses less digits than its factorization.

31980450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213218 (or 213213 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 31980450 is about 5655.1259932914. The cubic root of 31980450 is about 317.4155437007.

The spelling of 31980450 in words is "thirty-one million, nine hundred eighty thousand, four hundred fifty".