275397978 has 32 divisors (see below), whose sum is σ = 571354560. Its totient is φ = 88390400.

The previous prime is 275397973. The next prime is 275397979. The reversal of 275397978 is 879793572.

It is not an unprimeable number, because it can be changed into a prime (275397973) 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, 67801 + ... + 71747.

It is an arithmetic number, because the mean of its divisors is an integer number (17854830).

Almost surely, 2^275397978 is an apocalyptic number.

275397978 is an abundant number, since it is smaller than the sum of its proper divisors (295956582).

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

275397978 is a wasteful number, since it uses less digits than its factorization.

275397978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4382.

The product of its digits is 6667920, while the sum is 57.

The square root of 275397978 is about 16595.1191017118. The cubic root of 275397978 is about 650.6092732991.

The spelling of 275397978 in words is "two hundred seventy-five million, three hundred ninety-seven thousand, nine hundred seventy-eight".