90780606 has 24 divisors (see below), whose sum is σ = 224790384. Its totient is φ = 25937280.

The previous prime is 90780593. The next prime is 90780607. The reversal of 90780606 is 60608709.

It is a super-2 number, since 2×90780606² = 16482236851454472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90780607) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 360115 + ... + 360366.

It is an arithmetic number, because the mean of its divisors is an integer number (9366266).

Almost surely, 2^90780606 is an apocalyptic number.

90780606 is an abundant number, since it is smaller than the sum of its proper divisors (134009778).

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

90780606 is a wasteful number, since it uses less digits than its factorization.

90780606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720496 (or 720493 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 90780606 is about 9527.8857046041. The cubic root of 90780606 is about 449.4323806156.

The spelling of 90780606 in words is "ninety million, seven hundred eighty thousand, six hundred six".