1620769392 has 160 divisors (see below), whose sum is σ = 5373941760. Its totient is φ = 462228480.

The previous prime is 1620769391. The next prime is 1620769393. The reversal of 1620769392 is 2939670261.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1620769391) and next prime (1620769393).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620769391) 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, 70753 + ... + 90815.

It is an arithmetic number, because the mean of its divisors is an integer number (33587136).

Almost surely, 2^1620769392 is an apocalyptic number.

1620769392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1620769392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2686970880).

1620769392 is an abundant number, since it is smaller than the sum of its proper divisors (3753172368).

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

1620769392 is a wasteful number, since it uses less digits than its factorization.

1620769392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20108 (or 20096 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 1620769392 is about 40258.7803093934. The cubic root of 1620769392 is about 1174.6461930375.

The spelling of 1620769392 in words is "one billion, six hundred twenty million, seven hundred sixty-nine thousand, three hundred ninety-two".