400011215028 has 24 divisors (see below), whose sum is σ = 955065537888. Its totient is φ = 130236209376.

The previous prime is 400011215027. The next prime is 400011215063. The reversal of 400011215028 is 820512110004.

It is a junction number, because it is equal to n+sod(n) for n = 400011214989 and 400011215007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400011215027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 387607251 + ... + 387608282.

It is an arithmetic number, because the mean of its divisors is an integer number (39794397412).

Almost surely, 2^400011215028 is an apocalyptic number.

It is an amenable number.

400011215028 is an abundant number, since it is smaller than the sum of its proper divisors (555054322860).

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

400011215028 is a wasteful number, since it uses less digits than its factorization.

400011215028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775215583 (or 775215581 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 24.

The spelling of 400011215028 in words is "four hundred billion, eleven million, two hundred fifteen thousand, twenty-eight".