400146032128 has 40 divisors (see below), whose sum is σ = 799869271608. Its totient is φ = 199983243264.

The previous prime is 400146032107. The next prime is 400146032129. The reversal of 400146032128 is 821230641004.

It is a self number, because there is not a number n which added to its sum of digits gives 400146032128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400146032129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 974200 + ... + 1322632.

Almost surely, 2^400146032128 is an apocalyptic number.

It is an amenable number.

400146032128 is a deficient number, since it is larger than the sum of its proper divisors (399723239480).

400146032128 is an equidigital number, since it uses as much as digits as its factorization.

400146032128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350694 (or 350678 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The spelling of 400146032128 in words is "four hundred billion, one hundred forty-six million, thirty-two thousand, one hundred twenty-eight".