258440767 has 4 divisors (see below), whose sum is σ = 278320840. Its totient is φ = 238560696.

The previous prime is 258440761. The next prime is 258440771. The reversal of 258440767 is 767044852.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 258440767 - 2²⁷ = 124223039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258440761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9940017 + ... + 9940042.

It is an arithmetic number, because the mean of its divisors is an integer number (69580210).

Almost surely, 2^258440767 is an apocalyptic number.

258440767 is a deficient number, since it is larger than the sum of its proper divisors (19880073).

258440767 is a wasteful number, since it uses less digits than its factorization.

258440767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19880072.

The product of its (nonzero) digits is 376320, while the sum is 43.

The square root of 258440767 is about 16076.0930266032. The cubic root of 258440767 is about 636.9719976157.

The spelling of 258440767 in words is "two hundred fifty-eight million, four hundred forty thousand, seven hundred sixty-seven".