8158215428 has 48 divisors (see below), whose sum is σ = 15851360448. Its totient is φ = 3673366400.

The previous prime is 8158215419. The next prime is 8158215479. The reversal of 8158215428 is 8245128518.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 562508 + ... + 576828.

It is an arithmetic number, because the mean of its divisors is an integer number (330236676).

Almost surely, 2^8158215428 is an apocalyptic number.

It is an amenable number.

8158215428 is a deficient number, since it is larger than the sum of its proper divisors (7693145020).

8158215428 is a wasteful number, since it uses less digits than its factorization.

8158215428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14465 (or 14441 counting only the distinct ones).

The product of its digits is 204800, while the sum is 44.

The square root of 8158215428 is about 90322.8400129225. The cubic root of 8158215428 is about 2013.0986444737.

The spelling of 8158215428 in words is "eight billion, one hundred fifty-eight million, two hundred fifteen thousand, four hundred twenty-eight".