1620770252 has 24 divisors (see below), whose sum is σ = 2869618752. Its totient is φ = 800930000.

The previous prime is 1620770251. The next prime is 1620770269. The reversal of 1620770252 is 2520770261.

It is not an unprimeable number, because it can be changed into a prime (1620770251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125363 + ... + 137685.

It is an arithmetic number, because the mean of its divisors is an integer number (119567448).

Almost surely, 2^1620770252 is an apocalyptic number.

It is an amenable number.

1620770252 is a deficient number, since it is larger than the sum of its proper divisors (1248848500).

1620770252 is a wasteful number, since it uses less digits than its factorization.

1620770252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12709 (or 12707 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 1620770252 is about 40258.7909902918. The cubic root of 1620770252 is about 1174.6464007980.

Subtracting 1620770252 from its reverse (2520770261), we obtain a palindrome (900000009).

The spelling of 1620770252 in words is "one billion, six hundred twenty million, seven hundred seventy thousand, two hundred fifty-two".