287680137 has 24 divisors (see below), whose sum is σ = 408924000. Its totient is φ = 179859456.

The previous prime is 287680123. The next prime is 287680147. The reversal of 287680137 is 731086782.

It is not a de Polignac number, because 287680137 - 2⁶ = 287680073 is a prime.

It is a super-2 number, since 2×287680137² = 165519722448677538, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (287680147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 388914 + ... + 389652.

It is an arithmetic number, because the mean of its divisors is an integer number (17038500).

Almost surely, 2^287680137 is an apocalyptic number.

It is an amenable number.

287680137 is a deficient number, since it is larger than the sum of its proper divisors (121243863).

287680137 is a wasteful number, since it uses less digits than its factorization.

287680137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225 (or 1208 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 287680137 is about 16961.1360763364. The cubic root of 287680137 is about 660.1408767230.

The spelling of 287680137 in words is "two hundred eighty-seven million, six hundred eighty thousand, one hundred thirty-seven".