8215944 has 32 divisors (see below), whose sum is σ = 22407840. Its totient is φ = 2489600.

The previous prime is 8215897. The next prime is 8215951. The reversal of 8215944 is 4495128.

It is a super-2 number, since 2×8215944² = 135003471622272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 15297 + ... + 15824.

It is an arithmetic number, because the mean of its divisors is an integer number (700245).

Almost surely, 2^8215944 is an apocalyptic number.

It is an amenable number.

8215944 is an abundant number, since it is smaller than the sum of its proper divisors (14191896).

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

8215944 is a wasteful number, since it uses less digits than its factorization.

8215944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31141 (or 31137 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 8215944 is about 2866.3468038603. The cubic root of 8215944 is about 201.7835802585.

The spelling of 8215944 in words is "eight million, two hundred fifteen thousand, nine hundred forty-four".