104428821 has 16 divisors (see below), whose sum is σ = 159539328. Its totient is φ = 59520000.

The previous prime is 104428817. The next prime is 104428823. The reversal of 104428821 is 128824401.

It is not a de Polignac number, because 104428821 - 2² = 104428817 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104428823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2221 + ... + 14621.

It is an arithmetic number, because the mean of its divisors is an integer number (9971208).

Almost surely, 2^104428821 is an apocalyptic number.

It is an amenable number.

104428821 is a deficient number, since it is larger than the sum of its proper divisors (55110507).

104428821 is a wasteful number, since it uses less digits than its factorization.

104428821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12812.

The product of its (nonzero) digits is 4096, while the sum is 30.

The square root of 104428821 is about 10219.0420783946. The cubic root of 104428821 is about 470.9123984555.

The spelling of 104428821 in words is "one hundred four million, four hundred twenty-eight thousand, eight hundred twenty-one".