368728821 has 16 divisors (see below), whose sum is σ = 547684800. Its totient is φ = 245180304.

The previous prime is 368728817. The next prime is 368728859. The reversal of 368728821 is 128827863.

368728821 is a `hidden beast` number, since 368 + 7 + 288 + 2 + 1 = 666.

It is not a de Polignac number, because 368728821 - 2² = 368728817 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (368728121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7051 + ... + 28056.

It is an arithmetic number, because the mean of its divisors is an integer number (34230300).

Almost surely, 2^368728821 is an apocalyptic number.

It is an amenable number.

368728821 is a deficient number, since it is larger than the sum of its proper divisors (178955979).

368728821 is a wasteful number, since it uses less digits than its factorization.

368728821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35505 (or 35499 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 368728821 is about 19202.3129075640. The cubic root of 368728821 is about 717.0823420427.

The spelling of 368728821 in words is "three hundred sixty-eight million, seven hundred twenty-eight thousand, eight hundred twenty-one".