8215410 has 128 divisors (see below), whose sum is σ = 24883200. Its totient is φ = 1693440.

The previous prime is 8215399. The next prime is 8215411. The reversal of 8215410 is 145128.

It is a super-2 number, since 2×8215410² = 134985922936200, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8215411) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 115675 + ... + 115745.

It is an arithmetic number, because the mean of its divisors is an integer number (194400).

Almost surely, 2^8215410 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8215410, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12441600).

8215410 is an abundant number, since it is smaller than the sum of its proper divisors (16667790).

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

8215410 is a wasteful number, since it uses less digits than its factorization.

8215410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 8215410 is about 2866.2536524181. The cubic root of 8215410 is about 201.7792084839.

Adding to 8215410 its sum of digits (21), we get a triangular number (8215431 = T₄₀₅₃).

The spelling of 8215410 in words is "eight million, two hundred fifteen thousand, four hundred ten".