1979240 has 16 divisors (see below), whose sum is σ = 4453380. Its totient is φ = 791680.

The previous prime is 1979233. The next prime is 1979251. The reversal of 1979240 is 429791.

It can be written as a sum of positive squares in 2 ways, for example, as 1833316 + 145924 = 1354^2 + 382^2 .

It is a zygodrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 1979197 and 1979206.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 24701 + ... + 24780.

2^1979240 is an apocalyptic number.

1979240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1979240 is an abundant number, since it is smaller than the sum of its proper divisors (2474140).

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

1979240 is a wasteful number, since it uses less digits than its factorization.

1979240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49492 (or 49488 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 1979240 is about 1406.8546477870. The cubic root of 1979240 is about 125.5546552205.

The spelling of 1979240 in words is "one million, nine hundred seventy-nine thousand, two hundred forty".