331481890 has 32 divisors (see below), whose sum is σ = 633944880. Its totient is φ = 124556544.

The previous prime is 331481881. The next prime is 331481893. The reversal of 331481890 is 98184133.

It can be written as a sum of positive squares in 8 ways, for example, as 201270969 + 130210921 = 14187^2 + 11411^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (331481893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4717 + ... + 26176.

Almost surely, 2^331481890 is an apocalyptic number.

331481890 is a deficient number, since it is larger than the sum of its proper divisors (302462990).

331481890 is a wasteful number, since it uses less digits than its factorization.

331481890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30966.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 331481890 is about 18206.6441169151. The cubic root of 331481890 is about 692.0751711472.

The spelling of 331481890 in words is "three hundred thirty-one million, four hundred eighty-one thousand, eight hundred ninety".