90020678 has 32 divisors (see below), whose sum is σ = 156673440. Its totient is φ = 38338560.

The previous prime is 90020677. The next prime is 90020699. The reversal of 90020678 is 87602009.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90020677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116678 + ... + 117446.

It is an arithmetic number, because the mean of its divisors is an integer number (4896045).

Almost surely, 2^90020678 is an apocalyptic number.

90020678 is a deficient number, since it is larger than the sum of its proper divisors (66652762).

90020678 is a wasteful number, since it uses less digits than its factorization.

90020678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 90020678 is about 9487.9227442049. The cubic root of 90020678 is about 448.1747929488.

The spelling of 90020678 in words is "ninety million, twenty thousand, six hundred seventy-eight".