1979904 has 40 divisors (see below), whose sum is σ = 5278680. Its totient is φ = 659456.

The previous prime is 1979899. The next prime is 1979911. The reversal of 1979904 is 4099791.

It is a nialpdrome in base 8.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 892 + ... + 2180.

It is an arithmetic number, because the mean of its divisors is an integer number (131967).

2^1979904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1979904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2639340).

1979904 is an abundant number, since it is smaller than the sum of its proper divisors (3298776).

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

1979904 is an equidigital number, since it uses as much as digits as its factorization.

1979904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310 (or 1294 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 39.

The square root of 1979904 is about 1407.0906154189. The cubic root of 1979904 is about 125.5686941058.

It can be divided in two parts, 197 and 9904, that added together give a palindrome (10101).

The spelling of 1979904 in words is "one million, nine hundred seventy-nine thousand, nine hundred four".