1906630 has 16 divisors (see below), whose sum is σ = 3744144. Its totient is φ = 693280.

The previous prime is 1906627. The next prime is 1906637. The reversal of 1906630 is 366091.

It is a junction number, because it is equal to n+sod(n) for n = 1906595 and 1906604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1906637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8557 + ... + 8776.

It is an arithmetic number, because the mean of its divisors is an integer number (234009).

2^1906630 is an apocalyptic number.

1906630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1906630 is a deficient number, since it is larger than the sum of its proper divisors (1837514).

1906630 is a wasteful number, since it uses less digits than its factorization.

1906630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17351.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 1906630 is about 1380.8077346249. The cubic root of 1906630 is about 124.0001300727. Note that the first 3 decimals are identical.

The spelling of 1906630 in words is "one million, nine hundred six thousand, six hundred thirty".