1258877862 has 160 divisors (see below), whose sum is σ = 3222499104. Its totient is φ = 363916800.

The previous prime is 1258877861. The next prime is 1258877891. The reversal of 1258877862 is 2687788521.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 1258877799 and 1258877808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1258877861) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4021818 + ... + 4022130.

Almost surely, 2^1258877862 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1258877862, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1611249552).

1258877862 is an abundant number, since it is smaller than the sum of its proper divisors (1963621242).

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

1258877862 is a wasteful number, since it uses less digits than its factorization.

1258877862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436 (or 427 counting only the distinct ones).

The product of its digits is 3010560, while the sum is 54.

The square root of 1258877862 is about 35480.6688493890. The cubic root of 1258877862 is about 1079.7615677354.

The spelling of 1258877862 in words is "one billion, two hundred fifty-eight million, eight hundred seventy-seven thousand, eight hundred sixty-two".