90278874 has 144 divisors (see below), whose sum is σ = 250967808. Its totient is φ = 24167808.

The previous prime is 90278873. The next prime is 90278893. The reversal of 90278874 is 47887209.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90278873) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 404727 + ... + 404949.

It is an arithmetic number, because the mean of its divisors is an integer number (1742832).

Almost surely, 2^90278874 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90278874, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125483904).

90278874 is an abundant number, since it is smaller than the sum of its proper divisors (160688934).

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

90278874 is a wasteful number, since it uses less digits than its factorization.

90278874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 90278874 is about 9501.5195626805. The cubic root of 90278874 is about 448.6028667529.

The spelling of 90278874 in words is "ninety million, two hundred seventy-eight thousand, eight hundred seventy-four".