8401986 has 12 divisors (see below), whose sum is σ = 18204342. Its totient is φ = 2800656.

The previous prime is 8401973. The next prime is 8401993. The reversal of 8401986 is 6891048.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 5405625 + 2996361 = 2325^2 + 1731^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8401986.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 233371 + ... + 233406.

Almost surely, 2^8401986 is an apocalyptic number.

8401986 is an abundant number, since it is smaller than the sum of its proper divisors (9802356).

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

8401986 is a wasteful number, since it uses less digits than its factorization.

8401986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466785 (or 466782 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 8401986 is about 2898.6179465394. The cubic root of 8401986 is about 203.2952904432.

The spelling of 8401986 in words is "eight million, four hundred one thousand, nine hundred eighty-six".