1904680 has 32 divisors (see below), whose sum is σ = 4539240. Its totient is φ = 716800.

The previous prime is 1904647. The next prime is 1904681. The reversal of 1904680 is 864091.

It can be written as a sum of positive squares in 4 ways, for example, as 1726596 + 178084 = 1314^2 + 422^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1904681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 721 + ... + 2080.

2^1904680 is an apocalyptic number.

1904680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1904680 is an abundant number, since it is smaller than the sum of its proper divisors (2634560).

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

1904680 is a wasteful number, since it uses less digits than its factorization.

1904680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2829 (or 2825 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1904680 is about 1380.1014455467. The cubic root of 1904680 is about 123.9578420682.

The spelling of 1904680 in words is "one million, nine hundred four thousand, six hundred eighty".