2026640 has 120 divisors (see below), whose sum is σ = 6106752. Its totient is φ = 618240.

The previous prime is 2026639. The next prime is 2026663. The reversal of 2026640 is 466202.

2026640 = T₅₅ + T₅₆ + ... + T₂₃₀.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43097 + ... + 43143.

2^2026640 is an apocalyptic number.

2026640 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 2026640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3053376).

2026640 is an abundant number, since it is smaller than the sum of its proper divisors (4080112).

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

2026640 is a wasteful number, since it uses less digits than its factorization.

2026640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2026640 is about 1423.6010677153. The cubic root of 2026640 is about 126.5490443959.

The spelling of 2026640 in words is "two million, twenty-six thousand, six hundred forty".