1620163242 has 64 divisors (see below), whose sum is σ = 3732624000. Its totient is φ = 520297344.

The previous prime is 1620163183. The next prime is 1620163249. The reversal of 1620163242 is 2423610261.

1620163242 is a `hidden beast` number, since 1 + 6 + 20 + 1 + 632 + 4 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1620163249) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1006134 + ... + 1007742.

It is an arithmetic number, because the mean of its divisors is an integer number (58322250).

Almost surely, 2^1620163242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1620163242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1866312000).

1620163242 is an abundant number, since it is smaller than the sum of its proper divisors (2112460758).

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

1620163242 is a wasteful number, since it uses less digits than its factorization.

1620163242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2292 (or 2286 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1620163242 is about 40251.2514339617. The cubic root of 1620163242 is about 1174.4997398420.

The spelling of 1620163242 in words is "one billion, six hundred twenty million, one hundred sixty-three thousand, two hundred forty-two".