1604878879 has 8 divisors (see below), whose sum is σ = 1660689360. Its totient is φ = 1549099776.

The previous prime is 1604878861. The next prime is 1604878903. The reversal of 1604878879 is 9788784061.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1604878879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604878859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151087 + ... + 161359.

It is an arithmetic number, because the mean of its divisors is an integer number (207586170).

Almost surely, 2^1604878879 is an apocalyptic number.

1604878879 is a deficient number, since it is larger than the sum of its proper divisors (55810481).

1604878879 is a wasteful number, since it uses less digits than its factorization.

1604878879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15689.

The product of its (nonzero) digits is 5419008, while the sum is 58.

The square root of 1604878879 is about 40060.9395671145. The cubic root of 1604878879 is about 1170.7947163594.

The spelling of 1604878879 in words is "one billion, six hundred four million, eight hundred seventy-eight thousand, eight hundred seventy-nine".