90728862 has 16 divisors (see below), whose sum is σ = 207380352. Its totient is φ = 25922520.

The previous prime is 90728851. The next prime is 90728867. The reversal of 90728862 is 26882709.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 2160211 = 90728862 / (9 + 0 + 7 + 2 + 8 + 8 + 6 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90728867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1080064 + ... + 1080147.

It is an arithmetic number, because the mean of its divisors is an integer number (12961272).

Almost surely, 2^90728862 is an apocalyptic number.

90728862 is an abundant number, since it is smaller than the sum of its proper divisors (116651490).

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

90728862 is a wasteful number, since it uses less digits than its factorization.

90728862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2160223.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 90728862 is about 9525.1699197442. The cubic root of 90728862 is about 449.3469737944.

The spelling of 90728862 in words is "ninety million, seven hundred twenty-eight thousand, eight hundred sixty-two".