281039480 has 16 divisors (see below), whose sum is σ = 632338920. Its totient is φ = 112415776.

The previous prime is 281039477. The next prime is 281039497. The reversal of 281039480 is 84930182.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 281039480.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3512954 + ... + 3513033.

Almost surely, 2^281039480 is an apocalyptic number.

281039480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

281039480 is an abundant number, since it is smaller than the sum of its proper divisors (351299440).

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

281039480 is a wasteful number, since it uses less digits than its factorization.

281039480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7025998 (or 7025994 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 281039480 is about 16764.2321625537. The cubic root of 281039480 is about 655.0218356064.

The spelling of 281039480 in words is "two hundred eighty-one million, thirty-nine thousand, four hundred eighty".