401788828 has 24 divisors (see below), whose sum is σ = 819980000. Its totient is φ = 172194624.

The previous prime is 401788811. The next prime is 401788837. The reversal of 401788828 is 828887104.

It is a happy number.

It is a super-2 number, since 2×401788828² = 322868524611227168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 145053 + ... + 147796.

Almost surely, 2^401788828 is an apocalyptic number.

It is an amenable number.

401788828 is an abundant number, since it is smaller than the sum of its proper divisors (418191172).

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

401788828 is a wasteful number, since it uses less digits than its factorization.

401788828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292874 (or 292858 counting only the distinct ones).

The product of its (nonzero) digits is 229376, while the sum is 46.

The square root of 401788828 is about 20044.6708129617. The cubic root of 401788828 is about 737.9030162677.

The spelling of 401788828 in words is "four hundred one million, seven hundred eighty-eight thousand, eight hundred twenty-eight".