7879855 has 8 divisors (see below), whose sum is σ = 9576000. Its totient is φ = 6223776.

The previous prime is 7879849. The next prime is 7879871. The reversal of 7879855 is 5589787.

7879855 = 276² + 277² + ... + 354².

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 7879855 - 2³ = 7879847 is a prime.

It is a super-2 number, since 2×7879855² = 124184229642050, which contains 22 as substring.

7879855 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7879799 and 7879808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9580 + ... + 10369.

It is an arithmetic number, because the mean of its divisors is an integer number (1197000).

Almost surely, 2^7879855 is an apocalyptic number.

7879855 is a deficient number, since it is larger than the sum of its proper divisors (1696145).

7879855 is a wasteful number, since it uses less digits than its factorization.

7879855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20033.

The product of its digits is 705600, while the sum is 49.

The square root of 7879855 is about 2807.1079423492. The cubic root of 7879855 is about 198.9937373348.

The spelling of 7879855 in words is "seven million, eight hundred seventy-nine thousand, eight hundred fifty-five".