7798821 has 8 divisors (see below), whose sum is σ = 10440864. Its totient is φ = 5178000.

The previous prime is 7798811. The next prime is 7798831. The reversal of 7798821 is 1288977.

It is an interprime number because it is at equal distance from previous prime (7798811) and next prime (7798831).

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

It is not a de Polignac number, because 7798821 - 2¹⁵ = 7766053 is a prime.

7798821 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7798811) 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, 4426 + ... + 5931.

It is an arithmetic number, because the mean of its divisors is an integer number (1305108).

Almost surely, 2^7798821 is an apocalyptic number.

It is an amenable number.

7798821 is a deficient number, since it is larger than the sum of its proper divisors (2642043).

7798821 is a wasteful number, since it uses less digits than its factorization.

7798821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10611.

The product of its digits is 56448, while the sum is 42.

The square root of 7798821 is about 2792.6369259179. The cubic root of 7798821 is about 198.3092555255.

The spelling of 7798821 in words is "seven million, seven hundred ninety-eight thousand, eight hundred twenty-one".