3450640 has 20 divisors (see below), whose sum is σ = 8022924. Its totient is φ = 1380224.

The previous prime is 3450631. The next prime is 3450649. The reversal of 3450640 is 460543.

It is an interprime number because it is at equal distance from previous prime (3450631) and next prime (3450649).

It can be written as a sum of positive squares in 2 ways, for example, as 992016 + 2458624 = 996^2 + 1568^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3450649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21487 + ... + 21646.

Almost surely, 2^3450640 is an apocalyptic number.

It is an amenable number.

3450640 is an abundant number, since it is smaller than the sum of its proper divisors (4572284).

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

3450640 is a wasteful number, since it uses less digits than its factorization.

3450640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43146 (or 43140 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 3450640 is about 1857.5898363202. The cubic root of 3450640 is about 151.1123237760.

The spelling of 3450640 in words is "three million, four hundred fifty thousand, six hundred forty".