2420389 has 4 divisors (see below), whose sum is σ = 2429856. Its totient is φ = 2410924.

The previous prime is 2420377. The next prime is 2420399. The reversal of 2420389 is 9830242.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2420389 - 2⁷ = 2420261 is a prime.

It is a super-2 number, since 2×2420389² = 11716565822642, which contains 22 as substring.

It is a Duffinian 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 (2420309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4339 + ... + 4864.

It is an arithmetic number, because the mean of its divisors is an integer number (607464).

2^2420389 is an apocalyptic number.

It is an amenable number.

2420389 is a deficient number, since it is larger than the sum of its proper divisors (9467).

2420389 is an equidigital number, since it uses as much as digits as its factorization.

2420389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9466.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 2420389 is about 1555.7599429218. The cubic root of 2420389 is about 134.2646621916.

It can be divided in two parts, 2420 and 389, that added together give a square (2809 = 53²).

The spelling of 2420389 in words is "two million, four hundred twenty thousand, three hundred eighty-nine".