3902780 has 48 divisors (see below), whose sum is σ = 9541056. Its totient is φ = 1313280.

The previous prime is 3902779. The next prime is 3902783. The reversal of 3902780 is 872093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3902783) 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, 8312 + ... + 8768.

It is an arithmetic number, because the mean of its divisors is an integer number (198772).

Almost surely, 2^3902780 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 3902780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4770528).

3902780 is an abundant number, since it is smaller than the sum of its proper divisors (5638276).

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

3902780 is a wasteful number, since it uses less digits than its factorization.

3902780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534 (or 532 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 3902780 is about 1975.5454942876. The cubic root of 3902780 is about 157.4434835436.

The spelling of 3902780 in words is "three million, nine hundred two thousand, seven hundred eighty".