621118432 has 24 divisors (see below), whose sum is σ = 1333993752. Its totient is φ = 282326400.

The previous prime is 621118423. The next prime is 621118453. The reversal of 621118432 is 234811126.

It is a self number, because there is not a number n which added to its sum of digits gives 621118432.

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 3 ways as a sum of consecutive naturals, for example, 881919 + ... + 882622.

It is an arithmetic number, because the mean of its divisors is an integer number (55583073).

Almost surely, 2^621118432 is an apocalyptic number.

It is an amenable number.

621118432 is an abundant number, since it is smaller than the sum of its proper divisors (712875320).

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

621118432 is a wasteful number, since it uses less digits than its factorization.

621118432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1764562 (or 1764554 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 621118432 is about 24922.2477316955. The cubic root of 621118432 is about 853.2143263944.

Adding to 621118432 its reverse (234811126), we get a palindrome (855929558).

The spelling of 621118432 in words is "six hundred twenty-one million, one hundred eighteen thousand, four hundred thirty-two".