1978794 has 24 divisors (see below), whose sum is σ = 4380480. Its totient is φ = 645288.

The previous prime is 1978771. The next prime is 1978799. The reversal of 1978794 is 4978791.

It is not an unprimeable number, because it can be changed into a prime (1978799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 324 + ... + 2015.

It is an arithmetic number, because the mean of its divisors is an integer number (182520).

2^1978794 is an apocalyptic number.

1978794 is an abundant number, since it is smaller than the sum of its proper divisors (2401686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1978794 is a wasteful number, since it uses less digits than its factorization.

1978794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2394 (or 2391 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 1978794 is about 1406.6961292333. The cubic root of 1978794 is about 125.5452237244.

It can be divided in two parts, 19787 and 94, that added together give a square (19881 = 141²).

The spelling of 1978794 in words is "one million, nine hundred seventy-eight thousand, seven hundred ninety-four".