90471018 has 16 divisors (see below), whose sum is σ = 197391456. Its totient is φ = 27415440.

The previous prime is 90471001. The next prime is 90471019. The reversal of 90471018 is 81017409.

It is not an unprimeable number, because it can be changed into a prime (90471019) 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, 685321 + ... + 685452.

It is an arithmetic number, because the mean of its divisors is an integer number (12336966).

Almost surely, 2^90471018 is an apocalyptic number.

90471018 is an abundant number, since it is smaller than the sum of its proper divisors (106920438).

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

90471018 is a wasteful number, since it uses less digits than its factorization.

90471018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1370789.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 90471018 is about 9511.6254131457. The cubic root of 90471018 is about 448.9209008103.

The spelling of 90471018 in words is "ninety million, four hundred seventy-one thousand, eighteen".