1620196956 has 108 divisors (see below), whose sum is σ = 5014999080. Its totient is φ = 438540480.

The previous prime is 1620196829. The next prime is 1620196961. The reversal of 1620196956 is 6596910261.

It is a happy number.

1620196956 is a `hidden beast` number, since 1 + 620 + 19 + 6 + 9 + 5 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9346 + ... + 57686.

Almost surely, 2^1620196956 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1620196956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2507499540).

1620196956 is an abundant number, since it is smaller than the sum of its proper divisors (3394802124).

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

1620196956 is a wasteful number, since it uses less digits than its factorization.

1620196956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48384 (or 48372 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 1620196956 is about 40251.6702262155. The cubic root of 1620196956 is about 1174.5078865127.

The spelling of 1620196956 in words is "one billion, six hundred twenty million, one hundred ninety-six thousand, nine hundred fifty-six".