258276987 has 18 divisors (see below), whose sum is σ = 386386052. Its totient is φ = 166242384.

The previous prime is 258276947. The next prime is 258277009. The reversal of 258276987 is 789672852.

It is a happy number.

It is not a de Polignac number, because 258276987 - 2⁸ = 258276731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (258276947) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9493 + ... + 24630.

Almost surely, 2^258276987 is an apocalyptic number.

258276987 is a deficient number, since it is larger than the sum of its proper divisors (128109065).

258276987 is a wasteful number, since it uses less digits than its factorization.

258276987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34187 (or 34155 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The square root of 258276987 is about 16070.9983199551. The cubic root of 258276987 is about 636.8374144639.

Adding to 258276987 its sum of digits (54), we get a square (258277041 = 16071²).

The spelling of 258276987 in words is "two hundred fifty-eight million, two hundred seventy-six thousand, nine hundred eighty-seven".