90234020 has 24 divisors (see below), whose sum is σ = 189907200. Its totient is φ = 36014432.

The previous prime is 90234019. The next prime is 90234041. The reversal of 90234020 is 2043209.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 90233983 and 90234001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4871 + ... + 14289.

It is an arithmetic number, because the mean of its divisors is an integer number (7912800).

Almost surely, 2^90234020 is an apocalyptic number.

It is an amenable number.

90234020 is an abundant number, since it is smaller than the sum of its proper divisors (99673180).

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

90234020 is a wasteful number, since it uses less digits than its factorization.

90234020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9907 (or 9905 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 90234020 is about 9499.1589101351. The cubic root of 90234020 is about 448.5285600873.

Adding to 90234020 its reverse (2043209), we get a palindrome (92277229).

The spelling of 90234020 in words is "ninety million, two hundred thirty-four thousand, twenty".