287899725 has 24 divisors (see below), whose sum is σ = 476626240. Its totient is φ = 153342720.

The previous prime is 287899699. The next prime is 287899739. The reversal of 287899725 is 527998782.

It is not a de Polignac number, because 287899725 - 2¹³ = 287891533 is a prime.

It is a super-3 number, since 3×287899725³ (a number of 26 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66837 + ... + 71013.

Almost surely, 2^287899725 is an apocalyptic number.

287899725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

287899725 is a deficient number, since it is larger than the sum of its proper divisors (188726515).

287899725 is a wasteful number, since it uses less digits than its factorization.

287899725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5109 (or 5104 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 57.

The square root of 287899725 is about 16967.6081107503. The cubic root of 287899725 is about 660.3087971888.

The spelling of 287899725 in words is "two hundred eighty-seven million, eight hundred ninety-nine thousand, seven hundred twenty-five".