3980856 has 64 divisors (see below), whose sum is σ = 11508480. Its totient is φ = 1134080.

The previous prime is 3980843. The next prime is 3980857. The reversal of 3980856 is 6580893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3980857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4045 + ... + 4931.

It is an arithmetic number, because the mean of its divisors is an integer number (179820).

Almost surely, 2^3980856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3980856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5754240).

3980856 is an abundant number, since it is smaller than the sum of its proper divisors (7527624).

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

3980856 is a wasteful number, since it uses less digits than its factorization.

3980856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924 (or 920 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 3980856 is about 1995.2082598065. The cubic root of 3980856 is about 158.4864567304.

The spelling of 3980856 in words is "three million, nine hundred eighty thousand, eight hundred fifty-six".