88138845 has 12 divisors (see below), whose sum is σ = 152774076. Its totient is φ = 47007360.

The previous prime is 88138823. The next prime is 88138849. The reversal of 88138845 is 54883188.

It can be written as a sum of positive squares in 2 ways, for example, as 9603801 + 78535044 = 3099^2 + 8862^2 .

It is not a de Polignac number, because 88138845 - 2²¹ = 86041693 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), and also a Moran number because the ratio is a prime number: 1958641 = 88138845 / (8 + 8 + 1 + 3 + 8 + 8 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 88138845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88138849) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 979276 + ... + 979365.

It is an arithmetic number, because the mean of its divisors is an integer number (12731173).

Almost surely, 2^88138845 is an apocalyptic number.

It is an amenable number.

88138845 is a deficient number, since it is larger than the sum of its proper divisors (64635231).

88138845 is a wasteful number, since it uses less digits than its factorization.

88138845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1958652 (or 1958649 counting only the distinct ones).

The product of its digits is 245760, while the sum is 45.

The square root of 88138845 is about 9388.2290662297. The cubic root of 88138845 is about 445.0298258846.

The spelling of 88138845 in words is "eighty-eight million, one hundred thirty-eight thousand, eight hundred forty-five".