621821480 has 64 divisors (see below), whose sum is σ = 1654128000. Its totient is φ = 205841664.

The previous prime is 621821443. The next prime is 621821483. The reversal of 621821480 is 84128126.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (621821483) 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 15 ways as a sum of consecutive naturals, for example, 30170 + ... + 46409.

It is an arithmetic number, because the mean of its divisors is an integer number (25845750).

Almost surely, 2^621821480 is an apocalyptic number.

It is an amenable number.

621821480 is an abundant number, since it is smaller than the sum of its proper divisors (1032306520).

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

621821480 is a wasteful number, since it uses less digits than its factorization.

621821480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76626 (or 76622 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 621821480 is about 24936.3485699089. The cubic root of 621821480 is about 853.5361246281.

The spelling of 621821480 in words is "six hundred twenty-one million, eight hundred twenty-one thousand, four hundred eighty".