1620617052 has 24 divisors (see below), whose sum is σ = 3785314176. Its totient is φ = 539652208.

The previous prime is 1620617051. The next prime is 1620617069. The reversal of 1620617052 is 2507160261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620617051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56898 + ... + 80489.

It is an arithmetic number, because the mean of its divisors is an integer number (157721424).

Almost surely, 2^1620617052 is an apocalyptic number.

1620617052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1620617052 is an abundant number, since it is smaller than the sum of its proper divisors (2164697124).

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

1620617052 is a wasteful number, since it uses less digits than its factorization.

1620617052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138377 (or 138375 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 1620617052 is about 40256.8882553036. Note that the first 3 decimals coincide. The cubic root of 1620617052 is about 1174.6093892806.

The spelling of 1620617052 in words is "one billion, six hundred twenty million, six hundred seventeen thousand, fifty-two".