90551878 has 8 divisors (see below), whose sum is σ = 138390768. Its totient is φ = 44421624.

The previous prime is 90551873. The next prime is 90551917. The reversal of 90551878 is 87815509.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90551873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 427026 + ... + 427237.

It is an arithmetic number, because the mean of its divisors is an integer number (17298846).

Almost surely, 2^90551878 is an apocalyptic number.

90551878 is a deficient number, since it is larger than the sum of its proper divisors (47838890).

90551878 is a wasteful number, since it uses less digits than its factorization.

90551878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854318.

The product of its (nonzero) digits is 100800, while the sum is 43.

The square root of 90551878 is about 9515.8750517228. The cubic root of 90551878 is about 449.0546045300.

The spelling of 90551878 in words is "ninety million, five hundred fifty-one thousand, eight hundred seventy-eight".