3451986 has 48 divisors (see below), whose sum is σ = 8213400. Its totient is φ = 1042944.

The previous prime is 3451967. The next prime is 3451991. The reversal of 3451986 is 6891543.

It can be written as a sum of positive squares in 4 ways, for example, as 2996361 + 455625 = 1731^2 + 675^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3451986.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8680 + ... + 9068.

Almost surely, 2^3451986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3451986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4106700).

3451986 is an abundant number, since it is smaller than the sum of its proper divisors (4761414).

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

3451986 is a wasteful number, since it uses less digits than its factorization.

3451986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443 (or 440 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 3451986 is about 1857.9520984137. The cubic root of 3451986 is about 151.1319694791.

The spelling of 3451986 in words is "three million, four hundred fifty-one thousand, nine hundred eighty-six".