3669720 has 64 divisors (see below), whose sum is σ = 11236320. Its totient is φ = 958464.

The previous prime is 3669709. The next prime is 3669727. The reversal of 3669720 is 279663.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3669727) 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, 6072 + ... + 6648.

Almost surely, 2^3669720 is an apocalyptic number.

3669720 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 3669720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5618160).

3669720 is an abundant number, since it is smaller than the sum of its proper divisors (7566600).

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

3669720 is a wasteful number, since it uses less digits than its factorization.

3669720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 33.

The square root of 3669720 is about 1915.6513252677. The cubic root of 3669720 is about 154.2449578806.

It can be divided in two parts, 36 and 69720, that multiplied together give a triangular number (2509920 = T₂₂₄₀).

The spelling of 3669720 in words is "three million, six hundred sixty-nine thousand, seven hundred twenty".