1900906 has 32 divisors (see below), whose sum is σ = 3542400. Its totient is φ = 762048.

The previous prime is 1900903. The next prime is 1900907. The reversal of 1900906 is 6090091.

It is a super-2 number, since 2×1900906² = 7226887241672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1900903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11581 + ... + 11743.

It is an arithmetic number, because the mean of its divisors is an integer number (110700).

2^1900906 is an apocalyptic number.

1900906 is a deficient number, since it is larger than the sum of its proper divisors (1641494).

1900906 is a wasteful number, since it uses less digits than its factorization.

1900906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 1900906 is about 1378.7334767822. The cubic root of 1900906 is about 123.8759164570.

Adding to 1900906 its reverse (6090091), we get a palindrome (7990997).

It can be divided in two parts, 190090 and 6, that added together give a square (190096 = 436²).

The spelling of 1900906 in words is "one million, nine hundred thousand, nine hundred six".