988627861 has 6 divisors (see below), whose sum is σ = 1070526210. Its totient is φ = 912579408.

The previous prime is 988627859. The next prime is 988627873. The reversal of 988627861 is 168726889.

It can be written as a sum of positive squares in 3 ways, for example, as 52635025 + 935992836 = 7255^2 + 30594^2 .

It is not a de Polignac number, because 988627861 - 2¹ = 988627859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (988627811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2924766 + ... + 2925103.

It is an arithmetic number, because the mean of its divisors is an integer number (178421035).

Almost surely, 2^988627861 is an apocalyptic number.

It is an amenable number.

988627861 is a deficient number, since it is larger than the sum of its proper divisors (81898349).

988627861 is a wasteful number, since it uses less digits than its factorization.

988627861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5849895 (or 5849882 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 55.

The square root of 988627861 is about 31442.4531644718. The cubic root of 988627861 is about 996.1948260164.

It can be divided in two parts, 988 and 627861, that added together give a square (628849 = 793²).

The spelling of 988627861 in words is "nine hundred eighty-eight million, six hundred twenty-seven thousand, eight hundred sixty-one".