1920078427 has 8 divisors (see below), whose sum is σ = 1943938656. Its totient is φ = 1896361152.

The previous prime is 1920078409. The next prime is 1920078437. The reversal of 1920078427 is 7248700291.

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-1920078427 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1920078427.

It is not an unprimeable number, because it can be changed into a prime (1920078437) 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, 8583 + ... + 62560.

It is an arithmetic number, because the mean of its divisors is an integer number (242992332).

Almost surely, 2^1920078427 is an apocalyptic number.

1920078427 is a deficient number, since it is larger than the sum of its proper divisors (23860229).

1920078427 is a wasteful number, since it uses less digits than its factorization.

1920078427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71477.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 1920078427 is about 43818.6995128792. The cubic root of 1920078427 is about 1242.9099251319.

The spelling of 1920078427 in words is "one billion, nine hundred twenty million, seventy-eight thousand, four hundred twenty-seven".