1920887 has 8 divisors (see below), whose sum is σ = 1969920. Its totient is φ = 1872640.

The previous prime is 1920883. The next prime is 1920889. The reversal of 1920887 is 7880291.

It is a happy number.

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 1920887 - 2² = 1920883 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 (1920883) 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, 9962 + ... + 10152.

It is an arithmetic number, because the mean of its divisors is an integer number (246240).

2^1920887 is an apocalyptic number.

1920887 is a deficient number, since it is larger than the sum of its proper divisors (49033).

1920887 is a wasteful number, since it uses less digits than its factorization.

1920887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 1920887 is about 1385.9606776529. The cubic root of 1920887 is about 124.3084369806.

The spelling of 1920887 in words is "one million, nine hundred twenty thousand, eight hundred eighty-seven".