3523640 has 32 divisors (see below), whose sum is σ = 7998480. Its totient is φ = 1396992.

The previous prime is 3523627. The next prime is 3523649. The reversal of 3523640 is 463253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3523649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5159 + ... + 5801.

Almost surely, 2^3523640 is an apocalyptic number.

It is an amenable number.

3523640 is an abundant number, since it is smaller than the sum of its proper divisors (4474840).

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

3523640 is a wasteful number, since it uses less digits than its factorization.

3523640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791 (or 787 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 3523640 is about 1877.1361165350. The cubic root of 3523640 is about 152.1705150143.

Adding to 3523640 its reverse (463253), we get a palindrome (3986893).

The spelling of 3523640 in words is "three million, five hundred twenty-three thousand, six hundred forty".