1630920 has 32 divisors (see below), whose sum is σ = 4893120. Its totient is φ = 434880.

The previous prime is 1630919. The next prime is 1630927. The reversal of 1630920 is 290361.

It is not an unprimeable number, because it can be changed into a prime (1630927) 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, 6676 + ... + 6915.

It is an arithmetic number, because the mean of its divisors is an integer number (152910).

2^1630920 is an apocalyptic number.

1630920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1630920 is an abundant number, since it is smaller than the sum of its proper divisors (3262200).

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

1630920 is a wasteful number, since it uses less digits than its factorization.

1630920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13605 (or 13601 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 1630920 is about 1277.0747824619. The cubic root of 1630920 is about 117.7093295832.

The spelling of 1630920 in words is "one million, six hundred thirty thousand, nine hundred twenty".