287987970 has 32 divisors (see below), whose sum is σ = 692426880. Its totient is φ = 76657280.

The previous prime is 287987957. The next prime is 287987971. The reversal of 287987970 is 79789782.

It is a self number, because there is not a number n which added to its sum of digits gives 287987970.

It is not an unprimeable number, because it can be changed into a prime (287987971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8635 + ... + 25505.

It is an arithmetic number, because the mean of its divisors is an integer number (21638340).

Almost surely, 2^287987970 is an apocalyptic number.

287987970 is an abundant number, since it is smaller than the sum of its proper divisors (404438910).

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

287987970 is a wasteful number, since it uses less digits than its factorization.

287987970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17450.

The product of its (nonzero) digits is 3556224, while the sum is 57.

The square root of 287987970 is about 16970.2083075017. The cubic root of 287987970 is about 660.3762547007.

The spelling of 287987970 in words is "two hundred eighty-seven million, nine hundred eighty-seven thousand, nine hundred seventy".