321148890 has 36 divisors (see below), whose sum is σ = 835429374. Its totient is φ = 85594368.

The previous prime is 321148831. The next prime is 321148943. The reversal of 321148890 is 98841123.

It can be written as a sum of positive squares in 3 ways, for example, as 252142641 + 69006249 = 15879^2 + 8307^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 169066 + ... + 170954.

Almost surely, 2^321148890 is an apocalyptic number.

321148890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

321148890 is an abundant number, since it is smaller than the sum of its proper divisors (514280484).

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

321148890 is an equidigital number, since it uses as much as digits as its factorization.

321148890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3791 (or 1899 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 321148890 is about 17920.6275001742. The cubic root of 321148890 is about 684.8079735953.

The spelling of 321148890 in words is "three hundred twenty-one million, one hundred forty-eight thousand, eight hundred ninety".