276055440 has 80 divisors (see below), whose sum is σ = 874015488. Its totient is φ = 72045568.

The previous prime is 276055433. The next prime is 276055441. The reversal of 276055440 is 44550672.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (276055441) 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, 957 + ... + 23516.

Almost surely, 2^276055440 is an apocalyptic number.

276055440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 276055440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (437007744).

276055440 is an abundant number, since it is smaller than the sum of its proper divisors (597960048).

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

276055440 is a wasteful number, since it uses less digits than its factorization.

276055440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24536 (or 24530 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 33.

The square root of 276055440 is about 16614.9161899782. The cubic root of 276055440 is about 651.1265984876.

The spelling of 276055440 in words is "two hundred seventy-six million, fifty-five thousand, four hundred forty".