1630325840 has 320 divisors, whose sum is σ = 4819191552. Its totient is φ = 503808000.

The previous prime is 1630325831. The next prime is 1630325849. The reversal of 1630325840 is 485230361.

It is an interprime number because it is at equal distance from previous prime (1630325831) and next prime (1630325849).

It is a junction number, because it is equal to n+sod(n) for n = 1630325797 and 1630325806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1630325849) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16141790 + ... + 16141890.

Almost surely, 2^1630325840 is an apocalyptic number.

1630325840 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 1630325840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2409595776).

1630325840 is an abundant number, since it is smaller than the sum of its proper divisors (3188865712).

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

1630325840 is a wasteful number, since it uses less digits than its factorization.

1630325840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 1630325840 is about 40377.2936190627. The cubic root of 1630325840 is about 1176.9503362958.

The spelling of 1630325840 in words is "one billion, six hundred thirty million, three hundred twenty-five thousand, eight hundred forty".