3447920 has 80 divisors (see below), whose sum is σ = 9427968. Its totient is φ = 1148160.

The previous prime is 3447893. The next prime is 3447931. The reversal of 3447920 is 297443.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26255 + ... + 26385.

Almost surely, 2^3447920 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 3447920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4713984).

3447920 is an abundant number, since it is smaller than the sum of its proper divisors (5980048).

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

3447920 is a wasteful number, since it uses less digits than its factorization.

3447920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198 (or 192 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 3447920 is about 1856.8575605038. The cubic root of 3447920 is about 151.0726080937.

The spelling of 3447920 in words is "three million, four hundred forty-seven thousand, nine hundred twenty".