90285980 has 24 divisors (see below), whose sum is σ = 200754288. Its totient is φ = 33989888.

The previous prime is 90285973. The next prime is 90286003. The reversal of 90285980 is 8958209.

It is a happy number.

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, 132434 + ... + 133113.

It is an arithmetic number, because the mean of its divisors is an integer number (8364762).

Almost surely, 2^90285980 is an apocalyptic number.

It is an amenable number.

90285980 is an abundant number, since it is smaller than the sum of its proper divisors (110468308).

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

90285980 is a wasteful number, since it uses less digits than its factorization.

90285980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265573 (or 265571 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 90285980 is about 9501.8934955092. The cubic root of 90285980 is about 448.6146365362.

The spelling of 90285980 in words is "ninety million, two hundred eighty-five thousand, nine hundred eighty".