1906920 has 48 divisors (see below), whose sum is σ = 6198660. Its totient is φ = 508416.

The previous prime is 1906909. The next prime is 1906963. The reversal of 1906920 is 296091.

1906920 = T₉₆ + T₉₇ + ... + T₂₃₀.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1887876 + 19044 = 1374^2 + 138^2 .

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, 2289 + ... + 3008.

2^1906920 is an apocalyptic number.

1906920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1906920 is an abundant number, since it is smaller than the sum of its proper divisors (4291740).

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

1906920 is a wasteful number, since it uses less digits than its factorization.

1906920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5314 (or 5307 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 1906920 is about 1380.9127416314. The cubic root of 1906920 is about 124.0064165948.

The spelling of 1906920 in words is "one million, nine hundred six thousand, nine hundred twenty".