90771438 has 8 divisors (see below), whose sum is σ = 181542888. Its totient is φ = 30257144.

The previous prime is 90771433. The next prime is 90771463. The reversal of 90771438 is 83417709.

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

90771438 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 90771396 and 90771405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90771433) 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, 7564281 + ... + 7564292.

It is an arithmetic number, because the mean of its divisors is an integer number (22692861).

Almost surely, 2^90771438 is an apocalyptic number.

90771438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

90771438 is a wasteful number, since it uses less digits than its factorization.

90771438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15128578.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 90771438 is about 9527.4045783729. The cubic root of 90771438 is about 449.4172506043.

The spelling of 90771438 in words is "ninety million, seven hundred seventy-one thousand, four hundred thirty-eight".