3405644 has 48 divisors (see below), whose sum is σ = 7166880. Its totient is φ = 1397760.

The previous prime is 3405641. The next prime is 3405653. The reversal of 3405644 is 4465043.

It is a super-2 number, since 2×3405644² = 23196822109472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3405641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21614 + ... + 21770.

It is an arithmetic number, because the mean of its divisors is an integer number (149310).

Almost surely, 2^3405644 is an apocalyptic number.

3405644 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

3405644 is an abundant number, since it is smaller than the sum of its proper divisors (3761236).

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

3405644 is a wasteful number, since it uses less digits than its factorization.

3405644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 3405644 is about 1845.4387012307. The cubic root of 3405644 is about 150.4526180574.

The spelling of 3405644 in words is "three million, four hundred five thousand, six hundred forty-four".