278763272 has 12 divisors (see below), whose sum is σ = 522769695. Its totient is φ = 139358024.

The previous prime is 278763241. The next prime is 278763293. The reversal of 278763272 is 272367872.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 139381636 + 139381636 = 11806^2 + 11806^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=11806.

It is a super-2 number, since 2×278763272² = 155417923632291968, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 44273 + ... + 50175.

Almost surely, 2^278763272 is an apocalyptic number.

It is an amenable number.

278763272 is a deficient number, since it is larger than the sum of its proper divisors (244006423).

278763272 is an frugal number, since it uses more digits than its factorization.

278763272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11812 (or 5905 counting only the distinct ones).

The product of its digits is 395136, while the sum is 44.

The square root of 278763272 is about 16696.2053173768. The cubic root of 278763272 is about 653.2486453697.

The spelling of 278763272 in words is "two hundred seventy-eight million, seven hundred sixty-three thousand, two hundred seventy-two".