2129680 has 40 divisors (see below), whose sum is σ = 5660352. Its totient is φ = 729984.

The previous prime is 2129671. The next prime is 2129689. The reversal of 2129680 is 869212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2129671) and next prime (2129689).

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (2129689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1342 + ... + 2461.

2^2129680 is an apocalyptic number.

2129680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2129680 is an abundant number, since it is smaller than the sum of its proper divisors (3530672).

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

2129680 is a wasteful number, since it uses less digits than its factorization.

2129680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3823 (or 3817 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 2129680 is about 1459.3423176212. The cubic root of 2129680 is about 128.6583914903.

It can be divided in two parts, 2129 and 680, that added together give a square (2809 = 53²).

The spelling of 2129680 in words is "two million, one hundred twenty-nine thousand, six hundred eighty".