6940215 has 32 divisors (see below), whose sum is σ = 12484800. Its totient is φ = 3657600.

The previous prime is 6940207. The next prime is 6940217. The reversal of 6940215 is 5120496.

It is not a de Polignac number, because 6940215 - 2³ = 6940207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

6940215 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6940217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13381 + ... + 13889.

It is an arithmetic number, because the mean of its divisors is an integer number (390150).

Almost surely, 2^6940215 is an apocalyptic number.

6940215 is a deficient number, since it is larger than the sum of its proper divisors (5544585).

6940215 is a wasteful number, since it uses less digits than its factorization.

6940215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624 (or 618 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 6940215 is about 2634.4287805898. The cubic root of 6940215 is about 190.7469671841.

The spelling of 6940215 in words is "six million, nine hundred forty thousand, two hundred fifteen".