3521800726 has 4 divisors (see below), whose sum is σ = 5282701092. Its totient is φ = 1760900362.

The previous prime is 3521800697. The next prime is 3521800747. The reversal of 3521800726 is 6270081253.

It is a happy number.

3521800726 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6270081253 = 17 ⋅368828309.

It is a junction number, because it is equal to n+sod(n) for n = 3521800691 and 3521800700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 880450180 + ... + 880450183.

It is an arithmetic number, because the mean of its divisors is an integer number (1320675273).

Almost surely, 2^3521800726 is an apocalyptic number.

3521800726 is a deficient number, since it is larger than the sum of its proper divisors (1760900366).

3521800726 is a wasteful number, since it uses less digits than its factorization.

3521800726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760900365.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 3521800726 is about 59344.7615716838. The cubic root of 3521800726 is about 1521.4403368784.

Adding to 3521800726 its reverse (6270081253), we get a palindrome (9791881979).

The spelling of 3521800726 in words is "three billion, five hundred twenty-one million, eight hundred thousand, seven hundred twenty-six".