1622400000 has 396 divisors, whose sum is σ = 5852766024. Its totient is φ = 399360000.

The previous prime is 1622399993. The next prime is 1622400037. The reversal of 1622400000 is 42261.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 124799994 + ... + 124800006.

Almost surely, 2^1622400000 is an apocalyptic number.

1622400000 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 1622400000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2926383012).

1622400000 is an abundant number, since it is smaller than the sum of its proper divisors (4230366024).

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

1622400000 is an frugal number, since it uses more digits than its factorization.

1622400000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74 (or 23 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1622400000 is about 40279.0268005571. The cubic root of 1622400000 is about 1175.0399865674.

Multiplying 1622400000 by its sum of digits (15), we get a square (24336000000 = 156000²).

1622400000 divided by its sum of digits (15) gives a square (108160000 = 10400²).

Adding to 1622400000 its reverse (42261), we get a palindrome (1622442261).

The spelling of 1622400000 in words is "one billion, six hundred twenty-two million, four hundred thousand".