6214216440 has 64 divisors (see below), whose sum is σ = 18813722400. Its totient is φ = 1641917952.

The previous prime is 6214216357. The next prime is 6214216471. The reversal of 6214216440 is 446124126.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 6214216398 and 6214216407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224467 + ... + 250626.

Almost surely, 2^6214216440 is an apocalyptic number.

6214216440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6214216440 is an abundant number, since it is smaller than the sum of its proper divisors (12599505960).

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

6214216440 is a wasteful number, since it uses less digits than its factorization.

6214216440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475216 (or 475212 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 6214216440 is about 78830.3015343719. The cubic root of 6214216440 is about 1838.4936119059.

The spelling of 6214216440 in words is "six billion, two hundred fourteen million, two hundred sixteen thousand, four hundred forty".