403821828 has 48 divisors (see below), whose sum is σ = 1048407360. Its totient is φ = 134419392.

The previous prime is 403821823. The next prime is 403821857. The reversal of 403821828 is 828128304.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 403821792 and 403821801.

It is not an unprimeable number, because it can be changed into a prime (403821823) 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, 90375 + ... + 94737.

It is an arithmetic number, because the mean of its divisors is an integer number (21841820).

Almost surely, 2^403821828 is an apocalyptic number.

It is an amenable number.

403821828 is an abundant number, since it is smaller than the sum of its proper divisors (644585532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

403821828 is a wasteful number, since it uses less digits than its factorization.

403821828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5233 (or 5225 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 403821828 is about 20095.3185593063. The cubic root of 403821828 is about 739.1454879476.

The spelling of 403821828 in words is "four hundred three million, eight hundred twenty-one thousand, eight hundred twenty-eight".