321042040 has 96 divisors (see below), whose sum is σ = 802373040. Its totient is φ = 115512320.

The previous prime is 321042037. The next prime is 321042061. The reversal of 321042040 is 40240123.

321042040 = T₂₈₁ + T₂₈₂ + ... + T₁₂₄₈.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 546627 + ... + 547213.

Almost surely, 2^321042040 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 321042040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (401186520).

321042040 is an abundant number, since it is smaller than the sum of its proper divisors (481331000).

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

321042040 is a wasteful number, since it uses less digits than its factorization.

321042040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733 (or 718 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 321042040 is about 17917.6460507512. The cubic root of 321042040 is about 684.7320172909.

Adding to 321042040 its reverse (40240123), we get a palindrome (361282163).

The spelling of 321042040 in words is "three hundred twenty-one million, forty-two thousand, forty".