3945402 has 16 divisors (see below), whose sum is σ = 8767680. Its totient is φ = 1315116.

The previous prime is 3945391. The next prime is 3945413. The reversal of 3945402 is 2045493.

It is an interprime number because it is at equal distance from previous prime (3945391) and next prime (3945413).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 36478 + ... + 36585.

It is an arithmetic number, because the mean of its divisors is an integer number (547980).

Almost surely, 2^3945402 is an apocalyptic number.

3945402 is an abundant number, since it is smaller than the sum of its proper divisors (4822278).

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

3945402 is a wasteful number, since it uses less digits than its factorization.

3945402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73074 (or 73068 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 3945402 is about 1986.3036021716. The cubic root of 3945402 is about 158.0145529510.

The spelling of 3945402 in words is "three million, nine hundred forty-five thousand, four hundred two".