3978202 has 4 divisors (see below), whose sum is σ = 5967306. Its totient is φ = 1989100.

The previous prime is 3978197. The next prime is 3978217. The reversal of 3978202 is 2028793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2028793 = 13 ⋅156061.

It can be written as a sum of positive squares in only one way, i.e., 3530641 + 447561 = 1879^2 + 669^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994549 + ... + 994552.

Almost surely, 2^3978202 is an apocalyptic number.

3978202 is a deficient number, since it is larger than the sum of its proper divisors (1989104).

3978202 is a wasteful number, since it uses less digits than its factorization.

3978202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1989103.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 3978202 is about 1994.5430554390. The cubic root of 3978202 is about 158.4512284139.

The spelling of 3978202 in words is "three million, nine hundred seventy-eight thousand, two hundred two".