276649145 has 8 divisors (see below), whose sum is σ = 332085960. Its totient is φ = 221248000.

The previous prime is 276649127. The next prime is 276649147. The reversal of 276649145 is 541946672.

It can be written as a sum of positive squares in 4 ways, for example, as 7295401 + 269353744 = 2701^2 + 16412^2 .

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

It is not a de Polignac number, because 276649145 - 2¹² = 276645049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 276649096 and 276649105.

It is not an unprimeable number, because it can be changed into a prime (276649147) 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, 13091 + ... + 26919.

It is an arithmetic number, because the mean of its divisors is an integer number (41510745).

Almost surely, 2^276649145 is an apocalyptic number.

It is an amenable number.

276649145 is a deficient number, since it is larger than the sum of its proper divisors (55436815).

276649145 is a wasteful number, since it uses less digits than its factorization.

276649145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17835.

The product of its digits is 362880, while the sum is 44.

The square root of 276649145 is about 16632.7732203623. The cubic root of 276649145 is about 651.5930510646.

The spelling of 276649145 in words is "two hundred seventy-six million, six hundred forty-nine thousand, one hundred forty-five".