2620399 has 8 divisors (see below), whose sum is σ = 2729088. Its totient is φ = 2513280.

The previous prime is 2620379. The next prime is 2620403. The reversal of 2620399 is 9930262.

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

It is a cyclic number.

It is not a de Polignac number, because 2620399 - 2¹⁹ = 2096111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2620399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2620339) 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, 3939 + ... + 4555.

It is an arithmetic number, because the mean of its divisors is an integer number (341136).

2^2620399 is an apocalyptic number.

2620399 is a deficient number, since it is larger than the sum of its proper divisors (108689).

2620399 is a wasteful number, since it uses less digits than its factorization.

2620399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 2620399 is about 1618.7646524433. The cubic root of 2620399 is about 137.8655660649.

The spelling of 2620399 in words is "two million, six hundred twenty thousand, three hundred ninety-nine".