3942780 has 24 divisors (see below), whose sum is σ = 11039952. Its totient is φ = 1051392.

The previous prime is 3942773. The next prime is 3942781. The reversal of 3942780 is 872493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3942781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32797 + ... + 32916.

It is an arithmetic number, because the mean of its divisors is an integer number (459998).

Almost surely, 2^3942780 is an apocalyptic number.

3942780 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3942780 is an abundant number, since it is smaller than the sum of its proper divisors (7097172).

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

3942780 is a wasteful number, since it uses less digits than its factorization.

3942780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65725 (or 65723 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 3942780 is about 1985.6434725297. The cubic root of 3942780 is about 157.9795412275.

The spelling of 3942780 in words is "three million, nine hundred forty-two thousand, seven hundred eighty".