1630380 has 48 divisors (see below), whose sum is σ = 4727520. Its totient is φ = 419328.

The previous prime is 1630379. The next prime is 1630381. The reversal of 1630380 is 830361.

It is an interprime number because it is at equal distance from previous prime (1630379) and next prime (1630381).

It is not an unprimeable number, because it can be changed into a prime (1630381) 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, 1272 + ... + 2208.

It is an arithmetic number, because the mean of its divisors is an integer number (98490).

2^1630380 is an apocalyptic number.

1630380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1630380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2363760).

1630380 is an abundant number, since it is smaller than the sum of its proper divisors (3097140).

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

1630380 is a wasteful number, since it uses less digits than its factorization.

1630380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978 (or 976 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1630380 is about 1276.8633442934. The cubic root of 1630380 is about 117.6963369053.

The spelling of 1630380 in words is "one million, six hundred thirty thousand, three hundred eighty".