1620271200 has 72 divisors (see below), whose sum is σ = 5273990568. Its totient is φ = 432071680.

The previous prime is 1620271199. The next prime is 1620271249. The reversal of 1620271200 is 21720261.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 335157 + ... + 339956.

It is an arithmetic number, because the mean of its divisors is an integer number (73249869).

Almost surely, 2^1620271200 is an apocalyptic number.

1620271200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1620271200 is an abundant number, since it is smaller than the sum of its proper divisors (3653719368).

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

1620271200 is a wasteful number, since it uses less digits than its factorization.

1620271200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675136 (or 675123 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 1620271200 is about 40252.5924630948. The cubic root of 1620271200 is about 1174.5258264780.

Adding to 1620271200 its reverse (21720261), we get a palindrome (1641991461).

The spelling of 1620271200 in words is "one billion, six hundred twenty million, two hundred seventy-one thousand, two hundred".