2029640 has 16 divisors (see below), whose sum is σ = 4566780. Its totient is φ = 811840.

The previous prime is 2029633. The next prime is 2029649. The reversal of 2029640 is 469202.

It can be written as a sum of positive squares in 2 ways, for example, as 1909924 + 119716 = 1382^2 + 346^2 .

It is not an unprimeable number, because it can be changed into a prime (2029649) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 25331 + ... + 25410.

2^2029640 is an apocalyptic number.

2029640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2029640 is an abundant number, since it is smaller than the sum of its proper divisors (2537140).

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

2029640 is a wasteful number, since it uses less digits than its factorization.

2029640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50752 (or 50748 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 2029640 is about 1424.6543440428. The cubic root of 2029640 is about 126.6114563945.

The spelling of 2029640 in words is "two million, twenty-nine thousand, six hundred forty".