90438834 has 16 divisors (see below), whose sum is σ = 182669760. Its totient is φ = 29847600.

The previous prime is 90438833. The next prime is 90438839. The reversal of 90438834 is 43883409.

It is a junction number, because it is equal to n+sod(n) for n = 90438792 and 90438801.

It is not an unprimeable number, because it can be changed into a prime (90438833) 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, 74014 + ... + 75225.

It is an arithmetic number, because the mean of its divisors is an integer number (11416860).

Almost surely, 2^90438834 is an apocalyptic number.

90438834 is an abundant number, since it is smaller than the sum of its proper divisors (92230926).

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

90438834 is a wasteful number, since it uses less digits than its factorization.

90438834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149345.

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 90438834 is about 9509.9334382529. The cubic root of 90438834 is about 448.8676617208.

The spelling of 90438834 in words is "ninety million, four hundred thirty-eight thousand, eight hundred thirty-four".