88239645 has 64 divisors (see below), whose sum is σ = 170634240. Its totient is φ = 43006464.

The previous prime is 88239643. The next prime is 88239653. The reversal of 88239645 is 54693288.

It is not a de Polignac number, because 88239645 - 2¹ = 88239643 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 88239645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88239643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 240252 + ... + 240618.

It is an arithmetic number, because the mean of its divisors is an integer number (2666160).

Almost surely, 2^88239645 is an apocalyptic number.

It is an amenable number.

88239645 is a deficient number, since it is larger than the sum of its proper divisors (82394595).

88239645 is a wasteful number, since it uses less digits than its factorization.

88239645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531 (or 525 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 88239645 is about 9393.5959568208. The cubic root of 88239645 is about 445.1994140546.

The spelling of 88239645 in words is "eighty-eight million, two hundred thirty-nine thousand, six hundred forty-five".