90278895 has 16 divisors (see below), whose sum is σ = 165081600. Its totient is φ = 41270304.

The previous prime is 90278893. The next prime is 90278911. The reversal of 90278895 is 59887209.

It is a happy number.

It is not a de Polignac number, because 90278895 - 2¹ = 90278893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90278893) 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, 429795 + ... + 430004.

It is an arithmetic number, because the mean of its divisors is an integer number (10317600).

Almost surely, 2^90278895 is an apocalyptic number.

90278895 is a deficient number, since it is larger than the sum of its proper divisors (74802705).

90278895 is a wasteful number, since it uses less digits than its factorization.

90278895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859814.

The product of its (nonzero) digits is 362880, while the sum is 48.

The square root of 90278895 is about 9501.5206677668. The cubic root of 90278895 is about 448.6029015365.

It can be divided in two parts, 902 and 78895, that added together give a palindrome (79797).

The spelling of 90278895 in words is "ninety million, two hundred seventy-eight thousand, eight hundred ninety-five".