890120405 has 8 divisors (see below), whose sum is σ = 1071625632. Its totient is φ = 709775568.

The previous prime is 890120389. The next prime is 890120411. The reversal of 890120405 is 504021098.

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

It is a cyclic number.

It is not a de Polignac number, because 890120405 - 2⁴ = 890120389 is a prime.

It is a super-3 number, since 3×890120405³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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, 288407 + ... + 291476.

It is an arithmetic number, because the mean of its divisors is an integer number (133953204).

Almost surely, 2^890120405 is an apocalyptic number.

It is an amenable number.

890120405 is a deficient number, since it is larger than the sum of its proper divisors (181505227).

890120405 is a wasteful number, since it uses less digits than its factorization.

890120405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580195.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 890120405 is about 29834.8857044903. The cubic root of 890120405 is about 961.9435470263.

The spelling of 890120405 in words is "eight hundred ninety million, one hundred twenty thousand, four hundred five".