123896090 has 16 divisors (see below), whose sum is σ = 223550280. Its totient is φ = 49439040.

The previous prime is 123896081. The next prime is 123896107. The reversal of 123896090 is 90698321.

It can be written as a sum of positive squares in 4 ways, for example, as 88529281 + 35366809 = 9409^2 + 5947^2 .

It is a super-2 number, since 2×123896090² = 30700482234576200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10505 + ... + 18924.

Almost surely, 2^123896090 is an apocalyptic number.

123896090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123896090 is a deficient number, since it is larger than the sum of its proper divisors (99654190).

123896090 is a wasteful number, since it uses less digits than its factorization.

123896090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29857.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 123896090 is about 11130.8620510722. The cubic root of 123896090 is about 498.5237657544.

The spelling of 123896090 in words is "one hundred twenty-three million, eight hundred ninety-six thousand, ninety".