1630885 has 8 divisors (see below), whose sum is σ = 1964160. Its totient is φ = 1299984.

The previous prime is 1630859. The next prime is 1630891. The reversal of 1630885 is 5880361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1630885 - 2¹³ = 1622693 is a prime.

1630885 is a lucky number.

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1824 + ... + 2566.

It is an arithmetic number, because the mean of its divisors is an integer number (245520).

2^1630885 is an apocalyptic number.

It is an amenable number.

1630885 is a deficient number, since it is larger than the sum of its proper divisors (333275).

1630885 is an equidigital number, since it uses as much as digits as its factorization.

1630885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 1630885 is about 1277.0610791971. The cubic root of 1630885 is about 117.7084875521.

The spelling of 1630885 in words is "one million, six hundred thirty thousand, eight hundred eighty-five".