1978792 has 32 divisors (see below), whose sum is σ = 3916800. Its totient is φ = 936000.

The previous prime is 1978771. The next prime is 1978799. The reversal of 1978792 is 2978791.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1978799) 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, 19542 + ... + 19642.

It is an arithmetic number, because the mean of its divisors is an integer number (122400).

2^1978792 is an apocalyptic number.

It is an amenable number.

1978792 is a deficient number, since it is larger than the sum of its proper divisors (1938008).

1978792 is a wasteful number, since it uses less digits than its factorization.

1978792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 213 counting only the distinct ones).

The product of its digits is 63504, while the sum is 43.

The square root of 1978792 is about 1406.6954183476. The cubic root of 1978792 is about 125.5451814275.

Subtracting 1978792 from its reverse (2978791), we obtain a palindrome (999999).

The spelling of 1978792 in words is "one million, nine hundred seventy-eight thousand, seven hundred ninety-two".