3506240 has 28 divisors (see below), whose sum is σ = 8349996. Its totient is φ = 1402368.

The previous prime is 3506213. The next prime is 3506249. The reversal of 3506240 is 426053.

It can be written as a sum of positive squares in 2 ways, for example, as 1721344 + 1784896 = 1312^2 + 1336^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (3506249) 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, 5159 + ... + 5798.

Almost surely, 2^3506240 is an apocalyptic number.

It is an amenable number.

3506240 is an abundant number, since it is smaller than the sum of its proper divisors (4843756).

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

3506240 is a wasteful number, since it uses less digits than its factorization.

3506240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10974 (or 10964 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 3506240 is about 1872.4956608761. The cubic root of 3506240 is about 151.9196250967.

The spelling of 3506240 in words is "three million, five hundred six thousand, two hundred forty".