258383278 has 16 divisors (see below), whose sum is σ = 392878080. Its totient is φ = 127435896.

The previous prime is 258383269. The next prime is 258383291. The reversal of 258383278 is 872383852.

258383278 is a nontrivial binomial coefficient, being equal to C(22733, 2).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42625 + ... + 48307.

It is an arithmetic number, because the mean of its divisors is an integer number (24554880).

Almost surely, 2^258383278 is an apocalyptic number.

258383278 is the 22732-nd triangular number.

258383278 is the 7578-th centered nonagonal number.

258383278 is a deficient number, since it is larger than the sum of its proper divisors (134494802).

258383278 is a wasteful number, since it uses less digits than its factorization.

258383278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5991.

The product of its digits is 645120, while the sum is 46.

The square root of 258383278 is about 16074.3048994350. The cubic root of 258383278 is about 636.9247635832.

The spelling of 258383278 in words is "two hundred fifty-eight million, three hundred eighty-three thousand, two hundred seventy-eight".