287055988 has 6 divisors (see below), whose sum is σ = 502347986. Its totient is φ = 143527992.

The previous prime is 287055973. The next prime is 287055991. The reversal of 287055988 is 889550782.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 271986064 + 15069924 = 16492^2 + 3882^2 .

It is a super-2 number, since 2×287055988² = 164802280493312288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35881995 + ... + 35882002.

Almost surely, 2^287055988 is an apocalyptic number.

It is an amenable number.

287055988 is a deficient number, since it is larger than the sum of its proper divisors (215291998).

287055988 is a wasteful number, since it uses less digits than its factorization.

287055988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71764001 (or 71763999 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 52.

The square root of 287055988 is about 16942.7266990883. The cubic root of 287055988 is about 659.6631185566.

The spelling of 287055988 in words is "two hundred eighty-seven million, fifty-five thousand, nine hundred eighty-eight".