278046949 has 4 divisors (see below), whose sum is σ = 278237440. Its totient is φ = 277856460.

The previous prime is 278046943. The next prime is 278046961. The reversal of 278046949 is 949640872.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 278046949 - 2¹¹ = 278044901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278046943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93039 + ... + 95980.

It is an arithmetic number, because the mean of its divisors is an integer number (69559360).

Almost surely, 2^278046949 is an apocalyptic number.

It is an amenable number.

278046949 is a deficient number, since it is larger than the sum of its proper divisors (190491).

278046949 is a wasteful number, since it uses less digits than its factorization.

278046949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190490.

The product of its (nonzero) digits is 870912, while the sum is 49.

The square root of 278046949 is about 16674.7398480456. The cubic root of 278046949 is about 652.6886260983.

It can be divided in two parts, 2780 and 46949, that added together give a square (49729 = 223²).

The spelling of 278046949 in words is "two hundred seventy-eight million, forty-six thousand, nine hundred forty-nine".