321040032 has 48 divisors (see below), whose sum is σ = 843659712. Its totient is φ = 106895360.

The previous prime is 321040007. The next prime is 321040091. The reversal of 321040032 is 230040123.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×321040032² = 206133404293122048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 321039993 and 321040020.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153232 + ... + 155312.

It is an arithmetic number, because the mean of its divisors is an integer number (17576244).

Almost surely, 2^321040032 is an apocalyptic number.

321040032 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

321040032 is an abundant number, since it is smaller than the sum of its proper divisors (522619680).

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

321040032 is a wasteful number, since it uses less digits than its factorization.

321040032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3701 (or 3693 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 321040032 is about 17917.5900165173. The cubic root of 321040032 is about 684.7305897055.

Adding to 321040032 its reverse (230040123), we get a palindrome (551080155).

Subtracting from 321040032 its reverse (230040123), we obtain a palindrome (90999909).

The spelling of 321040032 in words is "three hundred twenty-one million, forty thousand, thirty-two".