321352380 has 48 divisors (see below), whose sum is σ = 999764640. Its totient is φ = 85693824.

The previous prime is 321352379. The next prime is 321352387. The reversal of 321352380 is 83253123.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321352387) 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, 297009 + ... + 298088.

It is an arithmetic number, because the mean of its divisors is an integer number (20828430).

Almost surely, 2^321352380 is an apocalyptic number.

321352380 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321352380 is an abundant number, since it is smaller than the sum of its proper divisors (678412260).

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

321352380 is a wasteful number, since it uses less digits than its factorization.

321352380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595115 (or 595107 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 321352380 is about 17926.3041366591. The cubic root of 321352380 is about 684.9525816537.

The spelling of 321352380 in words is "three hundred twenty-one million, three hundred fifty-two thousand, three hundred eighty".