3478644 has 36 divisors (see below), whose sum is σ = 9470916. Its totient is φ = 1070208.

The previous prime is 3478627. The next prime is 3478661. The reversal of 3478644 is 4468743.

3478644 is a `hidden beast` number, since 3 + 4 + 7 + 8 + 644 = 666.

It is an interprime number because it is at equal distance from previous prime (3478627) and next prime (3478661).

It can be written as a sum of positive squares in 2 ways, for example, as 345744 + 3132900 = 588^2 + 1770^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 3478599 and 3478608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3249 + ... + 4184.

It is an arithmetic number, because the mean of its divisors is an integer number (263081).

Almost surely, 2^3478644 is an apocalyptic number.

It is an amenable number.

3478644 is an abundant number, since it is smaller than the sum of its proper divisors (5992272).

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

3478644 is a wasteful number, since it uses less digits than its factorization.

3478644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7456 (or 7451 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 3478644 is about 1865.1123290569. The cubic root of 3478644 is about 151.5200117342.

Subtracting 3478644 from its reverse (4468743), we obtain a palindrome (990099).

The spelling of 3478644 in words is "three million, four hundred seventy-eight thousand, six hundred forty-four".