281030428 has 24 divisors (see below), whose sum is σ = 570453632. Its totient is φ = 118643184.

The previous prime is 281030411. The next prime is 281030443. The reversal of 281030428 is 824030182.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 281030396 and 281030405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73026 + ... + 76777.

Almost surely, 2^281030428 is an apocalyptic number.

281030428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

281030428 is an abundant number, since it is smaller than the sum of its proper divisors (289423204).

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

281030428 is a wasteful number, since it uses less digits than its factorization.

281030428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149881 (or 149879 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 281030428 is about 16763.9621808211. The cubic root of 281030428 is about 655.0148029986.

The spelling of 281030428 in words is "two hundred eighty-one million, thirty thousand, four hundred twenty-eight".