2708391 has 8 divisors (see below), whose sum is σ = 4127104. Its totient is φ = 1547640.

The previous prime is 2708371. The next prime is 2708401. The reversal of 2708391 is 1938072.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2708391 - 2⁶ = 2708327 is a prime.

It is a Duffinian number.

2708391 is a lucky number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2708311) 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, 64465 + ... + 64506.

It is an arithmetic number, because the mean of its divisors is an integer number (515888).

2^2708391 is an apocalyptic number.

2708391 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2708391 is a deficient number, since it is larger than the sum of its proper divisors (1418713).

2708391 is a wasteful number, since it uses less digits than its factorization.

2708391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128981.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 2708391 is about 1645.7189918087. The cubic root of 2708391 is about 139.3917660996.

The spelling of 2708391 in words is "two million, seven hundred eight thousand, three hundred ninety-one".