3491920 has 20 divisors (see below), whose sum is σ = 8118900. Its totient is φ = 1396736.

The previous prime is 3491899. The next prime is 3491923. The reversal of 3491920 is 291943.

It is a happy number.

3491920 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1498176 + 1993744 = 1224^2 + 1412^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3491923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21745 + ... + 21904.

It is an arithmetic number, because the mean of its divisors is an integer number (405945).

Almost surely, 2^3491920 is an apocalyptic number.

It is an amenable number.

3491920 is an abundant number, since it is smaller than the sum of its proper divisors (4626980).

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

3491920 is a wasteful number, since it uses less digits than its factorization.

3491920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43662 (or 43656 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 3491920 is about 1868.6679747885. The cubic root of 3491920 is about 151.7125221942.

The spelling of 3491920 in words is "three million, four hundred ninety-one thousand, nine hundred twenty".