287020028 has 12 divisors (see below), whose sum is σ = 503486760. Its totient is φ = 143166672.

The previous prime is 287020007. The next prime is 287020031. The reversal of 287020028 is 820020782.

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, 83951 + ... + 87302.

It is an arithmetic number, because the mean of its divisors is an integer number (41957230).

Almost surely, 2^287020028 is an apocalyptic number.

It is an amenable number.

287020028 is a deficient number, since it is larger than the sum of its proper divisors (216466732).

287020028 is a wasteful number, since it uses less digits than its factorization.

287020028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171676 (or 171674 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 287020028 is about 16941.6654435153. The cubic root of 287020028 is about 659.6355716931.

The spelling of 287020028 in words is "two hundred eighty-seven million, twenty thousand, twenty-eight".