621408348 has 84 divisors (see below), whose sum is σ = 1778765688. Its totient is φ = 188295840.

The previous prime is 621408343. The next prime is 621408349. The reversal of 621408348 is 843804126.

It is a super-2 number, since 2×621408348² = 772296669928178208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621408343) by changing a digit.

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 27 ways as a sum of consecutive naturals, for example, 22390 + ... + 41762.

It is an arithmetic number, because the mean of its divisors is an integer number (21175782).

Almost surely, 2^621408348 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 621408348, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (889382844).

621408348 is an abundant number, since it is smaller than the sum of its proper divisors (1157357340).

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

621408348 is a wasteful number, since it uses less digits than its factorization.

621408348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19406 (or 19389 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 621408348 is about 24928.0634626920. The cubic root of 621408348 is about 853.3470557825.

The spelling of 621408348 in words is "six hundred twenty-one million, four hundred eight thousand, three hundred forty-eight".