7880399 has 4 divisors (see below), whose sum is σ = 7898400. Its totient is φ = 7862400.

The previous prime is 7880393. The next prime is 7880413. The reversal of 7880399 is 9930887.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7880399 - 2⁸ = 7880143 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 (7880393) 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, 8327 + ... + 9224.

It is an arithmetic number, because the mean of its divisors is an integer number (1974600).

Almost surely, 2^7880399 is an apocalyptic number.

7880399 is a deficient number, since it is larger than the sum of its proper divisors (18001).

7880399 is a wasteful number, since it uses less digits than its factorization.

7880399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18000.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 7880399 is about 2807.2048375564. The cubic root of 7880399 is about 198.9983165266.

The spelling of 7880399 in words is "seven million, eight hundred eighty thousand, three hundred ninety-nine".