3525640 has 32 divisors (see below), whose sum is σ = 8352000. Its totient is φ = 1335744.

The previous prime is 3525637. The next prime is 3525671. The reversal of 3525640 is 465253.

It is an Ulam 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, 1560 + ... + 3079.

It is an arithmetic number, because the mean of its divisors is an integer number (261000).

Almost surely, 2^3525640 is an apocalyptic number.

It is an amenable number.

3525640 is an abundant number, since it is smaller than the sum of its proper divisors (4826360).

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

3525640 is a wasteful number, since it uses less digits than its factorization.

3525640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4669 (or 4665 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 3525640 is about 1877.6687673815. The cubic root of 3525640 is about 152.1992999704.

The spelling of 3525640 in words is "three million, five hundred twenty-five thousand, six hundred forty".