2403998821 has 8 divisors (see below), whose sum is σ = 2775752000. Its totient is φ = 2039326848.

The previous prime is 2403998759. The next prime is 2403998833. The reversal of 2403998821 is 1288993042.

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 2403998821 - 2⁹ = 2403998309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2403998021) 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, 1769571 + ... + 1770928.

It is an arithmetic number, because the mean of its divisors is an integer number (346969000).

Almost surely, 2^2403998821 is an apocalyptic number.

It is an amenable number.

2403998821 is a deficient number, since it is larger than the sum of its proper divisors (371753179).

2403998821 is an equidigital number, since it uses as much as digits as its factorization.

2403998821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3540603.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 2403998821 is about 49030.5906654203. The cubic root of 2403998821 is about 1339.6090827092.

The spelling of 2403998821 in words is "two billion, four hundred three million, nine hundred ninety-eight thousand, eight hundred twenty-one".