88139188 has 6 divisors (see below), whose sum is σ = 154243586. Its totient is φ = 44069592.

The previous prime is 88139173. The next prime is 88139201. The reversal of 88139188 is 88193188.

It can be written as a sum of positive squares in only one way, i.e., 74166544 + 13972644 = 8612^2 + 3738^2 .

It is a super-2 number, since 2×88139188² = 15537032922598688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11017395 + ... + 11017402.

Almost surely, 2^88139188 is an apocalyptic number.

It is an amenable number.

88139188 is a deficient number, since it is larger than the sum of its proper divisors (66104398).

88139188 is a wasteful number, since it uses less digits than its factorization.

88139188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22034801 (or 22034799 counting only the distinct ones).

The product of its digits is 110592, while the sum is 46.

The square root of 88139188 is about 9388.2473337679. The cubic root of 88139188 is about 445.0304031746.

The spelling of 88139188 in words is "eighty-eight million, one hundred thirty-nine thousand, one hundred eighty-eight".