287249436 has 24 divisors (see below), whose sum is σ = 744721040. Its totient is φ = 95749776.

The previous prime is 287249419. The next prime is 287249447. The reversal of 287249436 is 634942782.

It is a junction number, because it is equal to n+sod(n) for n = 287249391 and 287249400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1329751 + ... + 1329966.

Almost surely, 2^287249436 is an apocalyptic number.

It is an amenable number.

287249436 is an abundant number, since it is smaller than the sum of its proper divisors (457471604).

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

287249436 is a wasteful number, since it uses less digits than its factorization.

287249436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2659730 (or 2659722 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 287249436 is about 16948.4346179817. The cubic root of 287249436 is about 659.8112683500.

The spelling of 287249436 in words is "two hundred eighty-seven million, two hundred forty-nine thousand, four hundred thirty-six".