284139400 has 24 divisors (see below), whose sum is σ = 660624570. Its totient is φ = 113655680.

The previous prime is 284139371. The next prime is 284139439. The reversal of 284139400 is 4931482.

It can be written as a sum of positive squares in 3 ways, for example, as 146264836 + 137874564 = 12094^2 + 11742^2 .

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, 710149 + ... + 710548.

Almost surely, 2^284139400 is an apocalyptic number.

284139400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

284139400 is an abundant number, since it is smaller than the sum of its proper divisors (376485170).

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

284139400 is a wasteful number, since it uses less digits than its factorization.

284139400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420713 (or 1420704 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 284139400 is about 16856.4349730303. The cubic root of 284139400 is about 657.4213739730.

The spelling of 284139400 in words is "two hundred eighty-four million, one hundred thirty-nine thousand, four hundred".