400020876 has 48 divisors (see below), whose sum is σ = 1082188800. Its totient is φ = 127542096.

The previous prime is 400020847. The next prime is 400020877. The reversal of 400020876 is 678020004.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (400020877) 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, 78036 + ... + 83003.

It is an arithmetic number, because the mean of its divisors is an integer number (22545600).

Almost surely, 2^400020876 is an apocalyptic number.

400020876 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

400020876 is an abundant number, since it is smaller than the sum of its proper divisors (682167924).

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

400020876 is a wasteful number, since it uses less digits than its factorization.

400020876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161075 (or 161067 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 400020876 is about 20000.5218931907. The cubic root of 400020876 is about 736.8191174787.

The spelling of 400020876 in words is "four hundred million, twenty thousand, eight hundred seventy-six".