90705030 has 64 divisors (see below), whose sum is σ = 248246208. Its totient is φ = 21012480.

The previous prime is 90704981. The next prime is 90705037. The reversal of 90705030 is 3050709.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90705037) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 211 + ... + 13470.

It is an arithmetic number, because the mean of its divisors is an integer number (3878847).

Almost surely, 2^90705030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90705030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124123104).

90705030 is an abundant number, since it is smaller than the sum of its proper divisors (157541178).

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

90705030 is a wasteful number, since it uses less digits than its factorization.

90705030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13721.

The product of its (nonzero) digits is 945, while the sum is 24.

The square root of 90705030 is about 9523.9188362774. The cubic root of 90705030 is about 449.3076266135.

Adding to 90705030 its reverse (3050709), we get a palindrome (93755739).

The spelling of 90705030 in words is "ninety million, seven hundred five thousand, thirty".