400019328 has 48 divisors (see below), whose sum is σ = 1151100600. Its totient is φ = 133339392.

The previous prime is 400019317. The next prime is 400019363. The reversal of 400019328 is 823910004.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 172468 + ... + 174771.

Almost surely, 2^400019328 is an apocalyptic number.

400019328 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

400019328 is an abundant number, since it is smaller than the sum of its proper divisors (751081272).

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

400019328 is a wasteful number, since it uses less digits than its factorization.

400019328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347259 (or 347244 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 400019328 is about 20000.4831941631. The cubic root of 400019328 is about 736.8181670304.

The spelling of 400019328 in words is "four hundred million, nineteen thousand, three hundred twenty-eight".