1020862858 has 4 divisors (see below), whose sum is σ = 1531294290. Its totient is φ = 510431428.

The previous prime is 1020862849. The next prime is 1020862873. The reversal of 1020862858 is 8582680201.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 972379489 + 48483369 = 31183^2 + 6963^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1020862858.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255215713 + ... + 255215716.

Almost surely, 2^1020862858 is an apocalyptic number.

1020862858 is a deficient number, since it is larger than the sum of its proper divisors (510431432).

1020862858 is an equidigital number, since it uses as much as digits as its factorization.

1020862858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510431431.

The product of its (nonzero) digits is 61440, while the sum is 40.

The square root of 1020862858 is about 31950.9445556778. The cubic root of 1020862858 is about 1006.9064767670.

The spelling of 1020862858 in words is "one billion, twenty million, eight hundred sixty-two thousand, eight hundred fifty-eight".