3552640 has 128 divisors (see below), whose sum is σ = 10624320. Its totient is φ = 1105920.

The previous prime is 3552611. The next prime is 3552641. The reversal of 3552640 is 462553.

It is a tau number, because it is divible by the number of its divisors (128).

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3552641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58210 + ... + 58270.

Almost surely, 2^3552640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3552640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5312160).

3552640 is an abundant number, since it is smaller than the sum of its proper divisors (7071680).

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

3552640 is a wasteful number, since it uses less digits than its factorization.

3552640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100 (or 88 counting only the distinct ones).

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

The square root of 3552640 is about 1884.8448211988. The cubic root of 3552640 is about 152.5868357909.

The spelling of 3552640 in words is "three million, five hundred fifty-two thousand, six hundred forty".