1979420 has 24 divisors (see below), whose sum is σ = 4376400. Its totient is φ = 749952.

The previous prime is 1979413. The next prime is 1979437. The reversal of 1979420 is 249791.

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, 2225 + ... + 2984.

It is an arithmetic number, because the mean of its divisors is an integer number (182350).

2^1979420 is an apocalyptic number.

1979420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1979420 is an abundant number, since it is smaller than the sum of its proper divisors (2396980).

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

1979420 is a wasteful number, since it uses less digits than its factorization.

1979420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5237 (or 5235 counting only the distinct ones).

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

The square root of 1979420 is about 1406.9186188263. The cubic root of 1979420 is about 125.5584612526.

The spelling of 1979420 in words is "one million, nine hundred seventy-nine thousand, four hundred twenty".