278742023 has 8 divisors (see below), whose sum is σ = 318840192. Its totient is φ = 238713336.

The previous prime is 278742011. The next prime is 278742041. The reversal of 278742023 is 320247872.

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

It is a cyclic number.

It is not a de Polignac number, because 278742023 - 2⁸ = 278741767 is a prime.

It is a super-2 number, since 2×278742023² = 155394230772265058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278742073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8465 + ... + 25082.

It is an arithmetic number, because the mean of its divisors is an integer number (39855024).

Almost surely, 2^278742023 is an apocalyptic number.

278742023 is a deficient number, since it is larger than the sum of its proper divisors (40098169).

278742023 is a wasteful number, since it uses less digits than its factorization.

278742023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34741.

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 278742023 is about 16695.5689630512. The cubic root of 278742023 is about 653.2320467781.

Adding to 278742023 its reverse (320247872), we get a palindrome (598989895).

The spelling of 278742023 in words is "two hundred seventy-eight million, seven hundred forty-two thousand, twenty-three".