90006620 has 24 divisors (see below), whose sum is σ = 206197488. Its totient is φ = 32729600.

The previous prime is 90006571. The next prime is 90006643. The reversal of 90006620 is 2660009.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204341 + ... + 204780.

It is an arithmetic number, because the mean of its divisors is an integer number (8591562).

Almost surely, 2^90006620 is an apocalyptic number.

It is an amenable number.

90006620 is an abundant number, since it is smaller than the sum of its proper divisors (116190868).

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

90006620 is a wasteful number, since it uses less digits than its factorization.

90006620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409141 (or 409139 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 90006620 is about 9487.1818787246. The cubic root of 90006620 is about 448.1514621269.

Adding to 90006620 its reverse (2660009), we get a palindrome (92666629).

The spelling of 90006620 in words is "ninety million, six thousand, six hundred twenty".