402004320 has 48 divisors (see below), whose sum is σ = 1266315120. Its totient is φ = 107201024.

The previous prime is 402004319. The next prime is 402004331. The reversal of 402004320 is 23400204.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 402004320.

It is a congruent number.

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, 418275 + ... + 419234.

It is an arithmetic number, because the mean of its divisors is an integer number (26381565).

Almost surely, 2^402004320 is an apocalyptic number.

402004320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402004320 is an abundant number, since it is smaller than the sum of its proper divisors (864310800).

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

402004320 is a wasteful number, since it uses less digits than its factorization.

402004320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837527 (or 837519 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 402004320 is about 20050.0453864823. The cubic root of 402004320 is about 738.0349128980.

Adding to 402004320 its reverse (23400204), we get a palindrome (425404524).

The spelling of 402004320 in words is "four hundred two million, four thousand, three hundred twenty".