276277428 has 72 divisors (see below), whose sum is σ = 804323520. Its totient is φ = 78324480.

The previous prime is 276277427. The next prime is 276277447. The reversal of 276277428 is 824772672.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (276277427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28828 + ... + 37196.

It is an arithmetic number, because the mean of its divisors is an integer number (11171160).

Almost surely, 2^276277428 is an apocalyptic number.

276277428 is a gapful number since it is divisible by the number (28) 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 276277428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (402161760).

276277428 is an abundant number, since it is smaller than the sum of its proper divisors (528046092).

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

276277428 is a wasteful number, since it uses less digits than its factorization.

276277428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8517 (or 8512 counting only the distinct ones).

The product of its digits is 526848, while the sum is 45.

The square root of 276277428 is about 16621.5952303021. The cubic root of 276277428 is about 651.3010846517.

The spelling of 276277428 in words is "two hundred seventy-six million, two hundred seventy-seven thousand, four hundred twenty-eight".