3781986 has 16 divisors (see below), whose sum is σ = 8145984. Its totient is φ = 1163664.

The previous prime is 3781961. The next prime is 3781993. The reversal of 3781986 is 6891873.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24166 + ... + 24321.

It is an arithmetic number, because the mean of its divisors is an integer number (509124).

Almost surely, 2^3781986 is an apocalyptic number.

3781986 is an abundant number, since it is smaller than the sum of its proper divisors (4363998).

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

3781986 is a wasteful number, since it uses less digits than its factorization.

3781986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48505.

The product of its digits is 72576, while the sum is 42.

The square root of 3781986 is about 1944.7328865425. The cubic root of 3781986 is about 155.8020994783.

The spelling of 3781986 in words is "three million, seven hundred eighty-one thousand, nine hundred eighty-six".