1620671130 has 144 divisors (see below), whose sum is σ = 4604221440. Its totient is φ = 395321472.

The previous prime is 1620671123. The next prime is 1620671131. The reversal of 1620671130 is 311760261.

1620671130 is a `hidden beast` number, since 1 + 620 + 6 + 7 + 1 + 1 + 30 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1620671094 and 1620671103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620671131) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1931251 + ... + 1932089.

It is an arithmetic number, because the mean of its divisors is an integer number (31973760).

Almost surely, 2^1620671130 is an apocalyptic number.

1620671130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1620671130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2302110720).

1620671130 is an abundant number, since it is smaller than the sum of its proper divisors (2983550310).

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

1620671130 is a wasteful number, since it uses less digits than its factorization.

1620671130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005 (or 989 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 1620671130 is about 40257.5599111521. The cubic root of 1620671130 is about 1174.6224542260.

The spelling of 1620671130 in words is "one billion, six hundred twenty million, six hundred seventy-one thousand, one hundred thirty".