1397859858 has 24 divisors (see below), whose sum is σ = 3044560896. Its totient is φ = 463512600.

The previous prime is 1397859851. The next prime is 1397859907. The reversal of 1397859858 is 8589587931.

1397859858 is a `hidden beast` number, since 1 + 39 + 7 + 8 + 598 + 5 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1397859795 and 1397859804.

It is not an unprimeable number, because it can be changed into a prime (1397859851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 199858 + ... + 206733.

It is an arithmetic number, because the mean of its divisors is an integer number (126856704).

Almost surely, 2^1397859858 is an apocalyptic number.

1397859858 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1397859858 is an abundant number, since it is smaller than the sum of its proper divisors (1646701038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1397859858 is a wasteful number, since it uses less digits than its factorization.

1397859858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406790 (or 406787 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 63.

The square root of 1397859858 is about 37387.9640793665. The cubic root of 1397859858 is about 1118.1186148943.

The spelling of 1397859858 in words is "one billion, three hundred ninety-seven million, eight hundred fifty-nine thousand, eight hundred fifty-eight".