86839642 has 16 divisors (see below), whose sum is σ = 131676840. Its totient is φ = 42949888.

The previous prime is 86839639. The next prime is 86839673. The reversal of 86839642 is 24693868.

86839642 = T₂₄₃ + T₂₄₄ + ... + T₈₁₁.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 44342281 + 42497361 = 6659^2 + 6519^2 .

It is a super-2 number, since 2×86839642² = 15082246845376328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 86839592 and 86839601.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152334 + ... + 152902.

Almost surely, 2^86839642 is an apocalyptic number.

86839642 is a deficient number, since it is larger than the sum of its proper divisors (44837198).

86839642 is a wasteful number, since it uses less digits than its factorization.

86839642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265.

The product of its digits is 497664, while the sum is 46.

The square root of 86839642 is about 9318.7789972721. The cubic root of 86839642 is about 442.8323518455.

The spelling of 86839642 in words is "eighty-six million, eight hundred thirty-nine thousand, six hundred forty-two".