1612321400 has 24 divisors (see below), whose sum is σ = 3748647720. Its totient is φ = 644928480.

The previous prime is 1612321387. The next prime is 1612321423. The reversal of 1612321400 is 41232161.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 4030604 + ... + 4031003.

It is an arithmetic number, because the mean of its divisors is an integer number (156193655).

Almost surely, 2^1612321400 is an apocalyptic number.

1612321400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1612321400 is an abundant number, since it is smaller than the sum of its proper divisors (2136326320).

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

1612321400 is a wasteful number, since it uses less digits than its factorization.

1612321400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8061623 (or 8061614 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1612321400 is about 40153.7221188771. The cubic root of 1612321400 is about 1172.6017539059.

Adding to 1612321400 its reverse (41232161), we get a palindrome (1653553561).

The spelling of 1612321400 in words is "one billion, six hundred twelve million, three hundred twenty-one thousand, four hundred".