88139146 has 4 divisors (see below), whose sum is σ = 132208722. Its totient is φ = 44069572.

The previous prime is 88139141. The next prime is 88139173. The reversal of 88139146 is 64193188.

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., 71825625 + 16313521 = 8475^2 + 4039^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 88139099 and 88139108.

It is not an unprimeable number, because it can be changed into a prime (88139141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22034785 + ... + 22034788.

Almost surely, 2^88139146 is an apocalyptic number.

88139146 is a deficient number, since it is larger than the sum of its proper divisors (44069576).

88139146 is a wasteful number, since it uses less digits than its factorization.

88139146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44069575.

The product of its digits is 41472, while the sum is 40.

The square root of 88139146 is about 9388.2450969284. The cubic root of 88139146 is about 445.0303324861.

The spelling of 88139146 in words is "eighty-eight million, one hundred thirty-nine thousand, one hundred forty-six".