275640939 has 12 divisors (see below), whose sum is σ = 455026416. Its totient is φ = 157509072.

The previous prime is 275640929. The next prime is 275640949. The reversal of 275640939 is 939046572.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (275640929) and next prime (275640949).

It is not a de Polignac number, because 275640939 - 2⁷ = 275640811 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 275640894 and 275640903.

It is not an unprimeable number, because it can be changed into a prime (275640929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2187564 + ... + 2187689.

It is an arithmetic number, because the mean of its divisors is an integer number (37918868).

Almost surely, 2^275640939 is an apocalyptic number.

275640939 is a deficient number, since it is larger than the sum of its proper divisors (179385477).

275640939 is a wasteful number, since it uses less digits than its factorization.

275640939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4375266 (or 4375263 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 275640939 is about 16602.4377426931. The cubic root of 275640939 is about 650.8005434248.

The spelling of 275640939 in words is "two hundred seventy-five million, six hundred forty thousand, nine hundred thirty-nine".