1620622080 has 1080 divisors, whose sum is σ = 7612632720. Its totient is φ = 325140480.

The previous prime is 1620622057. The next prime is 1620622097. The reversal of 1620622080 is 802260261.

1620622080 is a `hidden beast` number, since 16 + 20 + 622 + 0 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1080).

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 119 ways as a sum of consecutive naturals, for example, 55883506 + ... + 55883534.

It is an arithmetic number, because the mean of its divisors is an integer number (7048734).

Almost surely, 2^1620622080 is an apocalyptic number.

1620622080 is a gapful number since it is divisible by the number (10) 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 1620622080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3806316360).

1620622080 is an abundant number, since it is smaller than the sum of its proper divisors (5992010640).

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

1620622080 is a wasteful number, since it uses less digits than its factorization.

1620622080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87 (or 57 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 1620622080 is about 40256.9507041952. The cubic root of 1620622080 is about 1174.6106040298.

The spelling of 1620622080 in words is "one billion, six hundred twenty million, six hundred twenty-two thousand, eighty".