1620314400 has 72 divisors (see below), whose sum is σ = 5274131184. Its totient is φ = 432083200.

The previous prime is 1620314393. The next prime is 1620314401. The reversal of 1620314400 is 44130261.

It is not an unprimeable number, because it can be changed into a prime (1620314401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 335166 + ... + 339965.

It is an arithmetic number, because the mean of its divisors is an integer number (73251822).

Almost surely, 2^1620314400 is an apocalyptic number.

1620314400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1620314400 is an abundant number, since it is smaller than the sum of its proper divisors (3653816784).

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

1620314400 is a wasteful number, since it uses less digits than its factorization.

1620314400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675154 (or 675141 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1620314400 is about 40253.1290709182. The cubic root of 1620314400 is about 1174.5362648674.

Adding to 1620314400 its reverse (44130261), we get a palindrome (1664444661).

It can be divided in two parts, 16203 and 14400, that added together give a palindrome (30603).

The spelling of 1620314400 in words is "one billion, six hundred twenty million, three hundred fourteen thousand, four hundred".