2420639 has 8 divisors (see below), whose sum is σ = 2640960. Its totient is φ = 2205216.

The previous prime is 2420633. The next prime is 2420687. The reversal of 2420639 is 9360242.

2420639 = T₉₀ + T₉₁ + ... + T₂₄₇.

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

It is a de Polignac number, because none of the positive numbers 2^k-2420639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2420633) 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, 152 + ... + 2205.

It is an arithmetic number, because the mean of its divisors is an integer number (330120).

2^2420639 is an apocalyptic number.

2420639 is a deficient number, since it is larger than the sum of its proper divisors (220321).

2420639 is a wasteful number, since it uses less digits than its factorization.

2420639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2449.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 2420639 is about 1555.8402874331. The cubic root of 2420639 is about 134.2692847282.

The spelling of 2420639 in words is "two million, four hundred twenty thousand, six hundred thirty-nine".