123890434 has 8 divisors (see below), whose sum is σ = 185884668. Its totient is φ = 61928880.

The previous prime is 123890423. The next prime is 123890447. The reversal of 123890434 is 434098321.

It can be written as a sum of positive squares in 2 ways, for example, as 112296409 + 11594025 = 10597^2 + 3405^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 123890434.

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, 6784 + ... + 17140.

Almost surely, 2^123890434 is an apocalyptic number.

123890434 is a deficient number, since it is larger than the sum of its proper divisors (61994234).

123890434 is a wasteful number, since it uses less digits than its factorization.

123890434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16340.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 123890434 is about 11130.6079798006. The cubic root of 123890434 is about 498.5161795765.

The spelling of 123890434 in words is "one hundred twenty-three million, eight hundred ninety thousand, four hundred thirty-four".