278641023 has 16 divisors (see below), whose sum is σ = 391776000. Its totient is φ = 175668480.

The previous prime is 278641009. The next prime is 278641031. The reversal of 278641023 is 320146872.

It is not a de Polignac number, because 278641023 - 2⁶ = 278640959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278641063) 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, 30063 + ... + 38223.

It is an arithmetic number, because the mean of its divisors is an integer number (24486000).

Almost surely, 2^278641023 is an apocalyptic number.

278641023 is a deficient number, since it is larger than the sum of its proper divisors (113134977).

278641023 is a wasteful number, since it uses less digits than its factorization.

278641023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8782.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 278641023 is about 16692.5439343439. The cubic root of 278641023 is about 653.1531393995.

Adding to 278641023 its reverse (320146872), we get a palindrome (598787895).

The spelling of 278641023 in words is "two hundred seventy-eight million, six hundred forty-one thousand, twenty-three".