90471938 has 16 divisors (see below), whose sum is σ = 140719680. Its totient is φ = 43572816.

The previous prime is 90471937. The next prime is 90471959. The reversal of 90471938 is 83917409.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 90471895 and 90471904.

It is not an unprimeable number, because it can be changed into a prime (90471937) 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, 26645 + ... + 29847.

It is an arithmetic number, because the mean of its divisors is an integer number (8794980).

Almost surely, 2^90471938 is an apocalyptic number.

90471938 is a deficient number, since it is larger than the sum of its proper divisors (50247742).

90471938 is a wasteful number, since it uses less digits than its factorization.

90471938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3721.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 90471938 is about 9511.6737748937. The cubic root of 90471938 is about 448.9224224977.

The spelling of 90471938 in words is "ninety million, four hundred seventy-one thousand, nine hundred thirty-eight".