1620372000 has 576 divisors, whose sum is σ = 6215698944. Its totient is φ = 367411200.

The previous prime is 1620371981. The next prime is 1620372007. The reversal of 1620372000 is 2730261.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620372007) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 34475977 + ... + 34476023.

It is an arithmetic number, because the mean of its divisors is an integer number (10791144).

Almost surely, 2^1620372000 is an apocalyptic number.

1620372000 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 1620372000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3107849472).

1620372000 is an abundant number, since it is smaller than the sum of its proper divisors (4595326944).

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

1620372000 is a wasteful number, since it uses less digits than its factorization.

1620372000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 87 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 1620372000 is about 40253.8445368886. The cubic root of 1620372000 is about 1174.5501824312.

The spelling of 1620372000 in words is "one billion, six hundred twenty million, three hundred seventy-two thousand".