321685476 has 48 divisors (see below), whose sum is σ = 864030720. Its totient is φ = 91245600.

The previous prime is 321685471. The next prime is 321685493. The reversal of 321685476 is 674586123.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (321685471) 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, 2100 + ... + 25451.

It is an arithmetic number, because the mean of its divisors is an integer number (18000640).

Almost surely, 2^321685476 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321685476, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (432015360).

321685476 is an abundant number, since it is smaller than the sum of its proper divisors (542345244).

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

321685476 is a wasteful number, since it uses less digits than its factorization.

321685476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27704 (or 27702 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 321685476 is about 17935.5924351553. The cubic root of 321685476 is about 685.1891611781.

The spelling of 321685476 in words is "three hundred twenty-one million, six hundred eighty-five thousand, four hundred seventy-six".