3942890 has 64 divisors (see below), whose sum is σ = 8847360. Its totient is φ = 1235520.

The previous prime is 3942889. The next prime is 3942907. The reversal of 3942890 is 982493.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3942890.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49871 + ... + 49949.

It is an arithmetic number, because the mean of its divisors is an integer number (138240).

Almost surely, 2^3942890 is an apocalyptic number.

3942890 is an abundant number, since it is smaller than the sum of its proper divisors (4904470).

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

3942890 is a wasteful number, since it uses less digits than its factorization.

3942890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 3942890 is about 1985.6711711661. The cubic root of 3942890 is about 157.9810103760.

The spelling of 3942890 in words is "three million, nine hundred forty-two thousand, eight hundred ninety".