1970820 has 36 divisors (see below), whose sum is σ = 5978700. Its totient is φ = 525504.

The previous prime is 1970809. The next prime is 1970867. The reversal of 1970820 is 280791.

It can be written as a sum of positive squares in 2 ways, for example, as 352836 + 1617984 = 594^2 + 1272^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5295 + ... + 5654.

It is an arithmetic number, because the mean of its divisors is an integer number (166075).

2^1970820 is an apocalyptic number.

1970820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1970820 is an abundant number, since it is smaller than the sum of its proper divisors (4007880).

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

1970820 is a wasteful number, since it uses less digits than its factorization.

1970820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10964 (or 10959 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 1970820 is about 1403.8589672756. The cubic root of 1970820 is about 125.3763590271.

The spelling of 1970820 in words is "one million, nine hundred seventy thousand, eight hundred twenty".