621011412 has 72 divisors (see below), whose sum is σ = 1807041600. Its totient is φ = 176145408.

The previous prime is 621011407. The next prime is 621011467. The reversal of 621011412 is 214110126.

621011412 is a `hidden beast` number, since 621 + 0 + 1 + 1 + 41 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26164 + ... + 43892.

It is an arithmetic number, because the mean of its divisors is an integer number (25097800).

Almost surely, 2^621011412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 621011412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (903520800).

621011412 is an abundant number, since it is smaller than the sum of its proper divisors (1186030188).

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

621011412 is a wasteful number, since it uses less digits than its factorization.

621011412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17885 (or 17880 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 621011412 is about 24920.1005615949. The cubic root of 621011412 is about 853.1653200442.

Adding to 621011412 its reverse (214110126), we get a palindrome (835121538).

It can be divided in two parts, 6210114 and 12, that added together give a palindrome (6210126).

The spelling of 621011412 in words is "six hundred twenty-one million, eleven thousand, four hundred twelve".