840328400 has 30 divisors (see below), whose sum is σ = 2018889942. Its totient is φ = 336131200.

The previous prime is 840328351. The next prime is 840328421. The reversal of 840328400 is 4823048.

It can be written as a sum of positive squares in 3 ways, for example, as 142945936 + 697382464 = 11956^2 + 26408^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1050011 + ... + 1050810.

Almost surely, 2^840328400 is an apocalyptic number.

840328400 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

840328400 is an abundant number, since it is smaller than the sum of its proper divisors (1178561542).

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

840328400 is a wasteful number, since it uses less digits than its factorization.

840328400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100839 (or 2100828 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 840328400 is about 28988.4183770001. The cubic root of 840328400 is about 943.6617396226.

The spelling of 840328400 in words is "eight hundred forty million, three hundred twenty-eight thousand, four hundred".