3520920 has 128 divisors (see below), whose sum is σ = 11874240. Its totient is φ = 829440.

The previous prime is 3520903. The next prime is 3520927. The reversal of 3520920 is 290253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3520927) 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, 57690 + ... + 57750.

Almost surely, 2^3520920 is an apocalyptic number.

3520920 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 3520920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5937120).

3520920 is an abundant number, since it is smaller than the sum of its proper divisors (8353320).

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

3520920 is a wasteful number, since it uses less digits than its factorization.

3520920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 3520920 is about 1876.4114687349. The cubic root of 3520920 is about 152.1313499892.

The spelling of 3520920 in words is "three million, five hundred twenty thousand, nine hundred twenty".