287428730 has 8 divisors (see below), whose sum is σ = 517371732. Its totient is φ = 114971488.

The previous prime is 287428717. The next prime is 287428733. The reversal of 287428730 is 37824782.

It can be written as a sum of positive squares in 2 ways, for example, as 285305881 + 2122849 = 16891^2 + 1457^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (287428733) 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, 14371427 + ... + 14371446.

Almost surely, 2^287428730 is an apocalyptic number.

287428730 is a deficient number, since it is larger than the sum of its proper divisors (229943002).

287428730 is a wasteful number, since it uses less digits than its factorization.

287428730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28742880.

The product of its (nonzero) digits is 150528, while the sum is 41.

The square root of 287428730 is about 16953.7231899073. The cubic root of 287428730 is about 659.9485190944.

The spelling of 287428730 in words is "two hundred eighty-seven million, four hundred twenty-eight thousand, seven hundred thirty".