8156399328 has 240 divisors, whose sum is σ = 29907529344. Its totient is φ = 2118493440.

The previous prime is 8156399231. The next prime is 8156399333. The reversal of 8156399328 is 8239936518.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 179151 + ... + 220017.

Almost surely, 2^8156399328 is an apocalyptic number.

8156399328 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8156399328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14953764672).

8156399328 is an abundant number, since it is smaller than the sum of its proper divisors (21751130016).

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

8156399328 is a wasteful number, since it uses less digits than its factorization.

8156399328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40907 (or 40890 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The square root of 8156399328 is about 90312.7860715192. The cubic root of 8156399328 is about 2012.9492547859.

The spelling of 8156399328 in words is "eight billion, one hundred fifty-six million, three hundred ninety-nine thousand, three hundred twenty-eight".