2663920 has 80 divisors (see below), whose sum is σ = 7285248. Its totient is φ = 887040.

The previous prime is 2663897. The next prime is 2663953. The reversal of 2663920 is 293662.

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

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 37485 + ... + 37555.

2^2663920 is an apocalyptic number.

2663920 is a gapful number since it is divisible by the number (20) 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 2663920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3642624).

2663920 is an abundant number, since it is smaller than the sum of its proper divisors (4621328).

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

2663920 is a wasteful number, since it uses less digits than its factorization.

2663920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 2663920 is about 1632.1519537102. The cubic root of 2663920 is about 138.6246277069.

It can be divided in two parts, 266 and 3920, that added together give a triangular number (4186 = T₉₁).

The spelling of 2663920 in words is "two million, six hundred sixty-three thousand, nine hundred twenty".