88640090 has 32 divisors (see below), whose sum is σ = 198923904. Its totient is φ = 27627840.

The previous prime is 88640087. The next prime is 88640131. The reversal of 88640090 is 9004688.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 88640090.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 56789 + ... + 58328.

It is an arithmetic number, because the mean of its divisors is an integer number (6216372).

Almost surely, 2^88640090 is an apocalyptic number.

88640090 is an abundant number, since it is smaller than the sum of its proper divisors (110283814).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

88640090 is a wasteful number, since it uses less digits than its factorization.

88640090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115142.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 88640090 is about 9414.8866164176. The cubic root of 88640090 is about 445.8718588616.

The spelling of 88640090 in words is "eighty-eight million, six hundred forty thousand, ninety".