400128827 has 8 divisors (see below), whose sum is σ = 460029696. Its totient is φ = 340912872.

The previous prime is 400128793. The next prime is 400128857. The reversal of 400128827 is 728821004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400128827 - 2²⁸ = 131693371 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400128793 and 400128802.

It is not an unprimeable number, because it can be changed into a prime (400128857) 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, 169973 + ... + 172310.

It is an arithmetic number, because the mean of its divisors is an integer number (57503712).

Almost surely, 2^400128827 is an apocalyptic number.

400128827 is a deficient number, since it is larger than the sum of its proper divisors (59900869).

400128827 is a wasteful number, since it uses less digits than its factorization.

400128827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342457.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 400128827 is about 20003.2204157231. The cubic root of 400128827 is about 736.8853916920.

The spelling of 400128827 in words is "four hundred million, one hundred twenty-eight thousand, eight hundred twenty-seven".