90881070 has 64 divisors (see below), whose sum is σ = 257886720. Its totient is φ = 20055168.

The previous prime is 90881069. The next prime is 90881081. The reversal of 90881070 is 7018809.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1372 + ... + 13551.

It is an arithmetic number, because the mean of its divisors is an integer number (4029480).

Almost surely, 2^90881070 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90881070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128943360).

90881070 is an abundant number, since it is smaller than the sum of its proper divisors (167005650).

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

90881070 is a wasteful number, since it uses less digits than its factorization.

90881070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14969.

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 90881070 is about 9533.1563503385. The cubic root of 90881070 is about 449.5981103197.

Adding to 90881070 its reverse (7018809), we get a palindrome (97899879).

The spelling of 90881070 in words is "ninety million, eight hundred eighty-one thousand, seventy".