1916978 has 24 divisors (see below), whose sum is σ = 3458304. Its totient is φ = 793800.

The previous prime is 1916977. The next prime is 1917001. The reversal of 1916978 is 8796191.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1916977) 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, 2723 + ... + 3353.

It is an arithmetic number, because the mean of its divisors is an integer number (144096).

2^1916978 is an apocalyptic number.

1916978 is a deficient number, since it is larger than the sum of its proper divisors (1541326).

1916978 is a wasteful number, since it uses less digits than its factorization.

1916978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678 (or 671 counting only the distinct ones).

The product of its digits is 27216, while the sum is 41.

The square root of 1916978 is about 1384.5497463074. The cubic root of 1916978 is about 124.2240572696.

The spelling of 1916978 in words is "one million, nine hundred sixteen thousand, nine hundred seventy-eight".