3640434 has 16 divisors (see below), whose sum is σ = 8321088. Its totient is φ = 1040112.

The previous prime is 3640409. The next prime is 3640447. The reversal of 3640434 is 4340463.

It is a Curzon number.

It is a congruent 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, 43297 + ... + 43380.

It is an arithmetic number, because the mean of its divisors is an integer number (520068).

Almost surely, 2^3640434 is an apocalyptic number.

3640434 is an abundant number, since it is smaller than the sum of its proper divisors (4680654).

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

3640434 is a wasteful number, since it uses less digits than its factorization.

3640434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86689.

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 3640434 is about 1907.9921383486. The cubic root of 3640434 is about 153.8335470311.

Adding to 3640434 its reverse (4340463), we get a palindrome (7980897).

It can be divided in two parts, 36 and 40434, that added together give a triangular number (40470 = T₂₈₄).

The spelling of 3640434 in words is "three million, six hundred forty thousand, four hundred thirty-four".