88005557 has 4 divisors (see below), whose sum is σ = 90152076. Its totient is φ = 85859040.

The previous prime is 88005553. The next prime is 88005571. The reversal of 88005557 is 75550088.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25816561 + 62188996 = 5081^2 + 7886^2 .

It is a cyclic number.

It is not a de Polignac number, because 88005557 - 2² = 88005553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 88005557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88005551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1073198 + ... + 1073279.

It is an arithmetic number, because the mean of its divisors is an integer number (22538019).

Almost surely, 2^88005557 is an apocalyptic number.

It is an amenable number.

88005557 is a deficient number, since it is larger than the sum of its proper divisors (2146519).

88005557 is a wasteful number, since it uses less digits than its factorization.

88005557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146518.

The product of its (nonzero) digits is 56000, while the sum is 38.

The square root of 88005557 is about 9381.1277040663. The cubic root of 88005557 is about 444.8053805360.

The spelling of 88005557 in words is "eighty-eight million, five thousand, five hundred fifty-seven".