90475438 has 16 divisors (see below), whose sum is σ = 141387120. Its totient is φ = 43384000.

The previous prime is 90475403. The next prime is 90475439. The reversal of 90475438 is 83457409.

It is a self number, because there is not a number n which added to its sum of digits gives 90475438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90475439) 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, 4513 + ... + 14188.

It is an arithmetic number, because the mean of its divisors is an integer number (8836695).

Almost surely, 2^90475438 is an apocalyptic number.

90475438 is a deficient number, since it is larger than the sum of its proper divisors (50911682).

90475438 is a wasteful number, since it uses less digits than its factorization.

90475438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18803.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 90475438 is about 9511.8577575571. The cubic root of 90475438 is about 448.9282114316.

The spelling of 90475438 in words is "ninety million, four hundred seventy-five thousand, four hundred thirty-eight".