1904490 has 48 divisors (see below), whose sum is σ = 5660928. Its totient is φ = 435168.

The previous prime is 1904489. The next prime is 1904509. The reversal of 1904490 is 944091.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 882 + ... + 2141.

It is an arithmetic number, because the mean of its divisors is an integer number (117936).

2^1904490 is an apocalyptic number.

1904490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1904490 is an abundant number, since it is smaller than the sum of its proper divisors (3756438).

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

1904490 is a wasteful number, since it uses less digits than its factorization.

1904490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3043 (or 3040 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1904490 is about 1380.0326083104. The cubic root of 1904490 is about 123.9537201557.

The spelling of 1904490 in words is "one million, nine hundred four thousand, four hundred ninety".