1258866428 has 6 divisors (see below), whose sum is σ = 2203016256. Its totient is φ = 629433212.

The previous prime is 1258866407. The next prime is 1258866431. The reversal of 1258866428 is 8246688521.

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, 157358300 + ... + 157358307.

It is an arithmetic number, because the mean of its divisors is an integer number (367169376).

Almost surely, 2^1258866428 is an apocalyptic number.

It is an amenable number.

1258866428 is a deficient number, since it is larger than the sum of its proper divisors (944149828).

1258866428 is a wasteful number, since it uses less digits than its factorization.

1258866428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314716611 (or 314716609 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 50.

The square root of 1258866428 is about 35480.5077190279. The cubic root of 1258866428 is about 1079.7582986782.

The spelling of 1258866428 in words is "one billion, two hundred fifty-eight million, eight hundred sixty-six thousand, four hundred twenty-eight".