276400128 has 48 divisors (see below), whose sum is σ = 736903440. Its totient is φ = 92131328.

The previous prime is 276400099. The next prime is 276400151. The reversal of 276400128 is 821004672.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 276400095 and 276400104.

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, 16350 + ... + 28637.

It is an arithmetic number, because the mean of its divisors is an integer number (15352155).

Almost surely, 2^276400128 is an apocalyptic number.

It is an amenable number.

276400128 is an abundant number, since it is smaller than the sum of its proper divisors (460503312).

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

276400128 is an equidigital number, since it uses as much as digits as its factorization.

276400128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45012 (or 44992 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 276400128 is about 16625.2858020547. The cubic root of 276400128 is about 651.3974887337.

The spelling of 276400128 in words is "two hundred seventy-six million, four hundred thousand, one hundred twenty-eight".