3901816 has 8 divisors (see below), whose sum is σ = 7315920. Its totient is φ = 1950904.

The previous prime is 3901801. The next prime is 3901819. The reversal of 3901816 is 6181093.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3901819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243856 + ... + 243871.

It is an arithmetic number, because the mean of its divisors is an integer number (914490).

Almost surely, 2^3901816 is an apocalyptic number.

It is an amenable number.

3901816 is a deficient number, since it is larger than the sum of its proper divisors (3414104).

3901816 is a wasteful number, since it uses less digits than its factorization.

3901816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487733 (or 487729 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 3901816 is about 1975.3014959747. The cubic root of 3901816 is about 157.4305194500.

The spelling of 3901816 in words is "three million, nine hundred one thousand, eight hundred sixteen".