86888642 has 4 divisors (see below), whose sum is σ = 130332966. Its totient is φ = 43444320.

The previous prime is 86888639. The next prime is 86888647. The reversal of 86888642 is 24688868.

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., 77457601 + 9431041 = 8801^2 + 3071^2 .

It is a super-2 number, since 2×86888642² = 15099272217208328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86888647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21722159 + ... + 21722162.

Almost surely, 2^86888642 is an apocalyptic number.

86888642 is a deficient number, since it is larger than the sum of its proper divisors (43444324).

86888642 is a wasteful number, since it uses less digits than its factorization.

86888642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43444323.

The product of its digits is 1179648, while the sum is 50.

The square root of 86888642 is about 9321.4077263040. The cubic root of 86888642 is about 442.9156268137.

The spelling of 86888642 in words is "eighty-six million, eight hundred eighty-eight thousand, six hundred forty-two".