3531720 has 64 divisors (see below), whose sum is σ = 11160000. Its totient is φ = 891648.

The previous prime is 3531713. The next prime is 3531727. The reversal of 3531720 is 271353.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3531713) and next prime (3531727).

It is a super-3 number, since 3×3531720³ (a number of 21 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3531727) 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, 1506 + ... + 3054.

It is an arithmetic number, because the mean of its divisors is an integer number (174375).

Almost surely, 2^3531720 is an apocalyptic number.

3531720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3531720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5580000).

3531720 is an abundant number, since it is smaller than the sum of its proper divisors (7628280).

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

3531720 is a wasteful number, since it uses less digits than its factorization.

3531720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582 (or 1578 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 21.

The square root of 3531720 is about 1879.2870988755. The cubic root of 3531720 is about 152.2867394438.

The spelling of 3531720 in words is "three million, five hundred thirty-one thousand, seven hundred twenty".