1620254160 has 240 divisors, whose sum is σ = 6262813440. Its totient is φ = 367718400.

The previous prime is 1620254143. The next prime is 1620254197. The reversal of 1620254160 is 614520261.

1620254160 is a `hidden beast` number, since 1 + 62 + 0 + 2 + 541 + 60 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 759976 + ... + 762104.

It is an arithmetic number, because the mean of its divisors is an integer number (26095056).

Almost surely, 2^1620254160 is an apocalyptic number.

1620254160 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 1620254160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3131406720).

1620254160 is an abundant number, since it is smaller than the sum of its proper divisors (4642559280).

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

1620254160 is a wasteful number, since it uses less digits than its factorization.

1620254160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2306 (or 2297 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1620254160 is about 40252.3807991527. The cubic root of 1620254160 is about 1174.5217090623.

The spelling of 1620254160 in words is "one billion, six hundred twenty million, two hundred fifty-four thousand, one hundred sixty".