1979388 has 18 divisors (see below), whose sum is σ = 5003544. Its totient is φ = 659784.

The previous prime is 1979387. The next prime is 1979399. The reversal of 1979388 is 8839791.

It is a tau number, because it is divible by the number of its divisors (18).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1979387) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27456 + ... + 27527.

2^1979388 is an apocalyptic number.

1979388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1979388 is an abundant number, since it is smaller than the sum of its proper divisors (3024156).

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

1979388 is a wasteful number, since it uses less digits than its factorization.

1979388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54993 (or 54988 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 1979388 is about 1406.9072464097. The cubic root of 1979388 is about 125.5577846415.

It can be divided in two parts, 19793 and 88, that added together give a square (19881 = 141²).

The spelling of 1979388 in words is "one million, nine hundred seventy-nine thousand, three hundred eighty-eight".