1979140 has 24 divisors (see below), whose sum is σ = 4401432. Its totient is φ = 744960.

The previous prime is 1979129. The next prime is 1979141. The reversal of 1979140 is 419791.

It can be written as a sum of positive squares in 4 ways, for example, as 777924 + 1201216 = 882^2 + 1096^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1979141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2571 + ... + 3250.

It is an arithmetic number, because the mean of its divisors is an integer number (183393).

2^1979140 is an apocalyptic number.

1979140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1979140 is an abundant number, since it is smaller than the sum of its proper divisors (2422292).

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

1979140 is a wasteful number, since it uses less digits than its factorization.

1979140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5847 (or 5845 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 1979140 is about 1406.8191070639. The cubic root of 1979140 is about 125.5525406585.

The spelling of 1979140 in words is "one million, nine hundred seventy-nine thousand, one hundred forty".