1620434502 has 48 divisors (see below), whose sum is σ = 3669988608. Its totient is φ = 515758320.

The previous prime is 1620434483. The next prime is 1620434521. The reversal of 1620434502 is 2054340261.

1620434502 is a `hidden beast` number, since 1 + 6 + 204 + 3 + 450 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (1620434483) and next prime (1620434521).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 258133 + ... + 264335.

It is an arithmetic number, because the mean of its divisors is an integer number (76458096).

Almost surely, 2^1620434502 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1620434502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1834994304).

1620434502 is an abundant number, since it is smaller than the sum of its proper divisors (2049554106).

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

1620434502 is a wasteful number, since it uses less digits than its factorization.

1620434502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6865 (or 6862 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 1620434502 is about 40254.6208776086. The cubic root of 1620434502 is about 1174.5652840646.

Adding to 1620434502 its reverse (2054340261), we get a palindrome (3674774763).

The spelling of 1620434502 in words is "one billion, six hundred twenty million, four hundred thirty-four thousand, five hundred two".