1620345000 has 80 divisors (see below), whose sum is σ = 5062004640. Its totient is φ = 432088000.

The previous prime is 1620344993. The next prime is 1620345037. The reversal of 1620345000 is 5430261.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 39012 + ... + 69011.

It is an arithmetic number, because the mean of its divisors is an integer number (63275058).

Almost surely, 2^1620345000 is an apocalyptic number.

1620345000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1620345000 is an abundant number, since it is smaller than the sum of its proper divisors (3441659640).

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

1620345000 is a wasteful number, since it uses less digits than its factorization.

1620345000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108052 (or 108033 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1620345000 is about 40253.5091637984. The cubic root of 1620345000 is about 1174.5436586142.

Adding to 1620345000 its reverse (5430261), we get a palindrome (1625775261).

The spelling of 1620345000 in words is "one billion, six hundred twenty million, three hundred forty-five thousand".