1902020 has 12 divisors (see below), whose sum is σ = 3994284. Its totient is φ = 760800.

The previous prime is 1902007. The next prime is 1902029. The reversal of 1902020 is 202091.

It can be written as a sum of positive squares in 2 ways, for example, as 611524 + 1290496 = 782^2 + 1136^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1901986 and 1902004.

It is not an unprimeable number, because it can be changed into a prime (1902029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47531 + ... + 47570.

It is an arithmetic number, because the mean of its divisors is an integer number (332857).

2^1902020 is an apocalyptic number.

1902020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1902020 is an abundant number, since it is smaller than the sum of its proper divisors (2092264).

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

1902020 is a wasteful number, since it uses less digits than its factorization.

1902020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95110 (or 95108 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1902020 is about 1379.1374115729. The cubic root of 1902020 is about 123.9001103278.

The spelling of 1902020 in words is "one million, nine hundred two thousand, twenty".