1920879 has 12 divisors (see below), whose sum is σ = 2827656. Its totient is φ = 1256112.

The previous prime is 1920859. The next prime is 1920883. The reversal of 1920879 is 9780291.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1920879 is a prime.

It is a super-2 number, since 2×1920879² = 7379552265282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920839) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1537 + ... + 2490.

It is an arithmetic number, because the mean of its divisors is an integer number (235638).

2^1920879 is an apocalyptic number.

1920879 is a deficient number, since it is larger than the sum of its proper divisors (906777).

1920879 is a wasteful number, since it uses less digits than its factorization.

1920879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4086 (or 4083 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 1920879 is about 1385.9577915651. The cubic root of 1920879 is about 124.3082644095.

The spelling of 1920879 in words is "one million, nine hundred twenty thousand, eight hundred seventy-nine".