1620222912 has 588 divisors, whose sum is σ = 6203185968. Its totient is φ = 410572800.

The previous prime is 1620222907. The next prime is 1620222931. The reversal of 1620222912 is 2192220261.

It is a happy number.

1620222912 is a `hidden beast` number, since 1 + 620 + 2 + 2 + 29 + 12 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 39517612 + ... + 39517652.

It is an arithmetic number, because the mean of its divisors is an integer number (10549636).

Almost surely, 2^1620222912 is an apocalyptic number.

1620222912 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 1620222912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3101592984).

1620222912 is an abundant number, since it is smaller than the sum of its proper divisors (4582963056).

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

1620222912 is an equidigital number, since it uses as much as digits as its factorization.

1620222912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1620222912 is about 40251.9926463275. The cubic root of 1620222912 is about 1174.5141584588.

The spelling of 1620222912 in words is "one billion, six hundred twenty million, two hundred twenty-two thousand, nine hundred twelve".