323400440 has 32 divisors (see below), whose sum is σ = 793802160. Its totient is φ = 117600000.

The previous prime is 323400437. The next prime is 323400443. The reversal of 323400440 is 44004323.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (323400437) and next prime (323400443).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323400443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367061 + ... + 367940.

Almost surely, 2^323400440 is an apocalyptic number.

It is an amenable number.

323400440 is an abundant number, since it is smaller than the sum of its proper divisors (470401720).

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

323400440 is a wasteful number, since it uses less digits than its factorization.

323400440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735023 (or 735019 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 323400440 is about 17983.3378436819. The cubic root of 323400440 is about 686.4046266100.

Adding to 323400440 its reverse (44004323), we get a palindrome (367404763).

The spelling of 323400440 in words is "three hundred twenty-three million, four hundred thousand, four hundred forty".