321420738 has 8 divisors (see below), whose sum is σ = 642841488. Its totient is φ = 107140244.

The previous prime is 321420727. The next prime is 321420761. The reversal of 321420738 is 837024123.

It is a sphenic number, since it is the product of 3 distinct primes.

321420738 is an admirable number.

It is a super-2 number, since 2×321420738² = 206622581632929288, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26785056 + ... + 26785067.

It is an arithmetic number, because the mean of its divisors is an integer number (80355186).

Almost surely, 2^321420738 is an apocalyptic number.

321420738 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

321420738 is a wasteful number, since it uses less digits than its factorization.

321420738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53570128.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 321420738 is about 17928.2106747996. The cubic root of 321420738 is about 685.0011458592.

The spelling of 321420738 in words is "three hundred twenty-one million, four hundred twenty thousand, seven hundred thirty-eight".