7779998 has 8 divisors (see below), whose sum is σ = 11699760. Its totient is φ = 3880080.

The previous prime is 7779997. The next prime is 7780007. The reversal of 7779998 is 8999777.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7779991) 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, 3938 + ... + 5573.

It is an arithmetic number, because the mean of its divisors is an integer number (1462470).

Almost surely, 2^7779998 is an apocalyptic number.

7779998 is a deficient number, since it is larger than the sum of its proper divisors (3919762).

7779998 is a wasteful number, since it uses less digits than its factorization.

7779998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9922.

The product of its digits is 2000376, while the sum is 56.

The square root of 7779998 is about 2789.2647776789. The cubic root of 7779998 is about 198.1495825761.

The spelling of 7779998 in words is "seven million, seven hundred seventy-nine thousand, nine hundred ninety-eight".