90238436 has 12 divisors (see below), whose sum is σ = 160897212. Its totient is φ = 44267808.

The previous prime is 90238399. The next prime is 90238457. The reversal of 90238436 is 63483209.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 67732900 + 22505536 = 8230^2 + 4744^2 .

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 90238396 and 90238405.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212615 + ... + 213038.

It is an arithmetic number, because the mean of its divisors is an integer number (13408101).

Almost surely, 2^90238436 is an apocalyptic number.

It is an amenable number.

90238436 is a deficient number, since it is larger than the sum of its proper divisors (70658776).

90238436 is a wasteful number, since it uses less digits than its factorization.

90238436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425710 (or 425708 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 90238436 is about 9499.3913489234. The cubic root of 90238436 is about 448.5358768762.

The spelling of 90238436 in words is "ninety million, two hundred thirty-eight thousand, four hundred thirty-six".