3520000 has 100 divisors (see below), whose sum is σ = 9587556. Its totient is φ = 1280000.

The previous prime is 3519983. The next prime is 3520007. The reversal of 3520000 is 253.

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3520007) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 319995 + ... + 320005.

Almost surely, 2^3520000 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 3520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4793778).

3520000 is an abundant number, since it is smaller than the sum of its proper divisors (6067556).

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

3520000 is an frugal number, since it uses more digits than its factorization.

3520000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49 (or 18 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 10.

The square root of 3520000 is about 1876.1663039294. The cubic root of 3520000 is about 152.1180984305.

Adding to 3520000 its reverse (253), we get a palindrome (3520253).

The spelling of 3520000 in words is "three million, five hundred twenty thousand".