6212640 has 144 divisors (see below), whose sum is σ = 22897728. Its totient is φ = 1387008.

The previous prime is 6212621. The next prime is 6212669. The reversal of 6212640 is 462126.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 144459 + ... + 144501.

It is an arithmetic number, because the mean of its divisors is an integer number (159012).

Almost surely, 2^6212640 is an apocalyptic number.

6212640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6212640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11448864).

6212640 is an abundant number, since it is smaller than the sum of its proper divisors (16685088).

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

6212640 is a wasteful number, since it uses less digits than its factorization.

6212640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 6212640 is about 2492.5168003446. The cubic root of 6212640 is about 183.8338134005.

Adding to 6212640 its reverse (462126), we get a palindrome (6674766).

The spelling of 6212640 in words is "six million, two hundred twelve thousand, six hundred forty".