3215278836 has 576 divisors, whose sum is σ = 11472814080. Its totient is φ = 734469120.

The previous prime is 3215278823. The next prime is 3215278849. The reversal of 3215278836 is 6388725123.

It is an interprime number because it is at equal distance from previous prime (3215278823) and next prime (3215278849).

It is a junction number, because it is equal to n+sod(n) for n = 3215278791 and 3215278800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 68410165 + ... + 68410211.

It is an arithmetic number, because the mean of its divisors is an integer number (19918080).

Almost surely, 2^3215278836 is an apocalyptic number.

3215278836 is a gapful number since it is divisible by the number (36) 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 3215278836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5736407040).

3215278836 is an abundant number, since it is smaller than the sum of its proper divisors (8257535244).

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

3215278836 is a wasteful number, since it uses less digits than its factorization.

3215278836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 159 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 3215278836 is about 56703.4287852154. The cubic root of 3215278836 is about 1475.9541980191.

The spelling of 3215278836 in words is "three billion, two hundred fifteen million, two hundred seventy-eight thousand, eight hundred thirty-six".