90146238 has 32 divisors (see below), whose sum is σ = 221899776. Its totient is φ = 23774688.

The previous prime is 90146219. The next prime is 90146261. The reversal of 90146238 is 83264109.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 90146199 and 90146208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82006 + ... + 83097.

It is an arithmetic number, because the mean of its divisors is an integer number (6934368).

Almost surely, 2^90146238 is an apocalyptic number.

90146238 is an abundant number, since it is smaller than the sum of its proper divisors (131753538).

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

90146238 is a wasteful number, since it uses less digits than its factorization.

90146238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165128.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 90146238 is about 9494.5372715051. The cubic root of 90146238 is about 448.3830661499.

The spelling of 90146238 in words is "ninety million, one hundred forty-six thousand, two hundred thirty-eight".