1979888 has 40 divisors (see below), whose sum is σ = 4218480. Its totient is φ = 896000.

The previous prime is 1979827. The next prime is 1979891. The reversal of 1979888 is 8889791.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7763 + ... + 8013.

It is an arithmetic number, because the mean of its divisors is an integer number (105462).

2^1979888 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 1979888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2109240).

1979888 is an abundant number, since it is smaller than the sum of its proper divisors (2238592).

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

1979888 is a wasteful number, since it uses less digits than its factorization.

1979888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305 (or 299 counting only the distinct ones).

The product of its digits is 290304, while the sum is 50.

The square root of 1979888 is about 1407.0849299172. The cubic root of 1979888 is about 125.5683558563.

Subtracting 1979888 from its reverse (8889791), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 1979888 in words is "one million, nine hundred seventy-nine thousand, eight hundred eighty-eight".