287628704 has 24 divisors (see below), whose sum is σ = 617748768. Its totient is φ = 130740160.

The previous prime is 287628703. The next prime is 287628743. The reversal of 287628704 is 407826782.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (287628701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408212 + ... + 408915.

It is an arithmetic number, because the mean of its divisors is an integer number (25739532).

Almost surely, 2^287628704 is an apocalyptic number.

It is an amenable number.

287628704 is an abundant number, since it is smaller than the sum of its proper divisors (330120064).

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

287628704 is a wasteful number, since it uses less digits than its factorization.

287628704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817148 (or 817140 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 44.

The square root of 287628704 is about 16959.6198070594. The cubic root of 287628704 is about 660.1015332011.

The spelling of 287628704 in words is "two hundred eighty-seven million, six hundred twenty-eight thousand, seven hundred four".