3821634 has 64 divisors (see below), whose sum is σ = 9434880. Its totient is φ = 1140480.

The previous prime is 3821633. The next prime is 3821639. The reversal of 3821634 is 4361283.

It is a happy number.

3821634 is a `hidden beast` number, since 3 + 8 + 21 + 634 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 3821598 and 3821607.

It is not an unprimeable number, because it can be changed into a prime (3821633) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21024 + ... + 21204.

It is an arithmetic number, because the mean of its divisors is an integer number (147420).

Almost surely, 2^3821634 is an apocalyptic number.

3821634 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3821634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4717440).

3821634 is an abundant number, since it is smaller than the sum of its proper divisors (5613246).

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

3821634 is a wasteful number, since it uses less digits than its factorization.

3821634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232 (or 226 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 3821634 is about 1954.8999974423. The cubic root of 3821634 is about 156.3446521972.

It can be divided in two parts, 382 and 1634, that added together give a triangular number (2016 = T₆₃).

The spelling of 3821634 in words is "three million, eight hundred twenty-one thousand, six hundred thirty-four".