6890390385 has 8 divisors (see below), whose sum is σ = 11024624640. Its totient is φ = 3674874864.

The previous prime is 6890390329. The next prime is 6890390417. The reversal of 6890390385 is 5830930986.

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

It is not a de Polignac number, because 6890390385 - 2⁹ = 6890389873 is a prime.

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, 229679665 + ... + 229679694.

It is an arithmetic number, because the mean of its divisors is an integer number (1378078080).

Almost surely, 2^6890390385 is an apocalyptic number.

It is an amenable number.

6890390385 is a deficient number, since it is larger than the sum of its proper divisors (4134234255).

6890390385 is a wasteful number, since it uses less digits than its factorization.

6890390385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459359367.

The product of its (nonzero) digits is 1399680, while the sum is 51.

The square root of 6890390385 is about 83008.3753906797. The cubic root of 6890390385 is about 1902.8940554097.

The spelling of 6890390385 in words is "six billion, eight hundred ninety million, three hundred ninety thousand, three hundred eighty-five".