281424420 has 36 divisors (see below), whose sum is σ = 853654620. Its totient is φ = 75046464.

The previous prime is 281424401. The next prime is 281424431. The reversal of 281424420 is 24424182.

It can be written as a sum of positive squares in 2 ways, for example, as 42536484 + 238887936 = 6522^2 + 15456^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 781555 + ... + 781914.

Almost surely, 2^281424420 is an apocalyptic number.

281424420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

281424420 is an abundant number, since it is smaller than the sum of its proper divisors (572230200).

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

281424420 is a wasteful number, since it uses less digits than its factorization.

281424420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563484 (or 1563479 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

The square root of 281424420 is about 16775.7092249478. The cubic root of 281424420 is about 655.3207604790.

The spelling of 281424420 in words is "two hundred eighty-one million, four hundred twenty-four thousand, four hundred twenty".