3980856816 has 120 divisors (see below), whose sum is σ = 12176970624. Its totient is φ = 1208586240.

The previous prime is 3980856797. The next prime is 3980856821. The reversal of 3980856816 is 6186580893.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49660 + ... + 102116.

Almost surely, 2^3980856816 is an apocalyptic number.

3980856816 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 3980856816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6088485312).

3980856816 is an abundant number, since it is smaller than the sum of its proper divisors (8196113808).

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

3980856816 is a wasteful number, since it uses less digits than its factorization.

3980856816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52519 (or 52510 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The square root of 3980856816 is about 63094.0315402337. The cubic root of 3980856816 is about 1584.8646755931.

The spelling of 3980856816 in words is "three billion, nine hundred eighty million, eight hundred fifty-six thousand, eight hundred sixteen".