88887861 has 10 divisors (see below), whose sum is σ = 132783222. Its totient is φ = 59258520.

The previous prime is 88887839. The next prime is 88887907. The reversal of 88887861 is 16878888.

It can be written as a sum of positive squares in only one way, i.e., 85932900 + 2954961 = 9270^2 + 1719^2 .

It is not a de Polignac number, because 88887861 - 2⁵ = 88887829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 88887798 and 88887807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88887961) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 548610 + ... + 548771.

Almost surely, 2^88887861 is an apocalyptic number.

88887861 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

88887861 is a deficient number, since it is larger than the sum of its proper divisors (43895361).

88887861 is a wasteful number, since it uses less digits than its factorization.

88887861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097393 (or 1097384 counting only the distinct ones).

The product of its digits is 1376256, while the sum is 54.

The square root of 88887861 is about 9428.0359036228. The cubic root of 88887861 is about 446.2869131248.

The spelling of 88887861 in words is "eighty-eight million, eight hundred eighty-seven thousand, eight hundred sixty-one".