2861763858 has 54 divisors (see below), whose sum is σ = 6452458311. Its totient is φ = 951878628.

The previous prime is 2861763851. The next prime is 2861763859. The reversal of 2861763858 is 8583671682.

It can be written as a sum of positive squares in only one way, i.e., 1430881929 + 1430881929 = 37827^2 + 37827^2 .

It is a tau number, because it is divible by the number of its divisors (54).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=37827.

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

Its product of digits (3870720) is a multiple of the sum of its prime factors (960).

It is not an unprimeable number, because it can be changed into a prime (2861763851) 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 26 ways as a sum of consecutive naturals, for example, 6127741 + ... + 6128207.

Almost surely, 2^2861763858 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2861763858

2861763858 is an abundant number, since it is smaller than the sum of its proper divisors (3590694453).

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

2861763858 is an frugal number, since it uses more digits than its factorization.

2861763858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960 (or 472 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

The square root of 2861763858 is about 53495.4564238871. The cubic root of 2861763858 is about 1419.7479976665.

The spelling of 2861763858 in words is "two billion, eight hundred sixty-one million, seven hundred sixty-three thousand, eight hundred fifty-eight".