400803020 has 12 divisors (see below), whose sum is σ = 841686384. Its totient is φ = 160321200.

The previous prime is 400803019. The next prime is 400803077. The reversal of 400803020 is 20308004.

It is a super-2 number, since 2×400803020² = 321286121682240800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 400803020.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10020056 + ... + 10020095.

It is an arithmetic number, because the mean of its divisors is an integer number (70140532).

Almost surely, 2^400803020 is an apocalyptic number.

It is an amenable number.

400803020 is an abundant number, since it is smaller than the sum of its proper divisors (440883364).

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

400803020 is a wasteful number, since it uses less digits than its factorization.

400803020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20040160 (or 20040158 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 400803020 is about 20020.0654344585. The cubic root of 400803020 is about 737.2990286447.

The spelling of 400803020 in words is "four hundred million, eight hundred three thousand, twenty".