90645806 has 16 divisors (see below), whose sum is σ = 145183104. Its totient is φ = 42343224.

The previous prime is 90645803. The next prime is 90645839. The reversal of 90645806 is 60854609.

It is a self number, because there is not a number n which added to its sum of digits gives 90645806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90645803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20936 + ... + 24891.

It is an arithmetic number, because the mean of its divisors is an integer number (9073944).

Almost surely, 2^90645806 is an apocalyptic number.

90645806 is a deficient number, since it is larger than the sum of its proper divisors (54537298).

90645806 is a wasteful number, since it uses less digits than its factorization.

90645806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45895.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 90645806 is about 9520.8091042726. The cubic root of 90645806 is about 449.2098165713.

The spelling of 90645806 in words is "ninety million, six hundred forty-five thousand, eight hundred six".