3551688 has 128 divisors (see below), whose sum is σ = 11808000. Its totient is φ = 979776.

The previous prime is 3551687. The next prime is 3551699. The reversal of 3551688 is 8861553.

It is a super-2 number, since 2×3551688² = 25228975298688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (3551687) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122458 + ... + 122486.

It is an arithmetic number, because the mean of its divisors is an integer number (92250).

Almost surely, 2^3551688 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 3551688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5904000).

3551688 is an abundant number, since it is smaller than the sum of its proper divisors (8256312).

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

3551688 is an equidigital number, since it uses as much as digits as its factorization.

3551688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63 (or 41 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 3551688 is about 1884.5922635944. The cubic root of 3551688 is about 152.5732050220.

The spelling of 3551688 in words is "three million, five hundred fifty-one thousand, six hundred eighty-eight".