278672 has 10 divisors (see below), whose sum is σ = 539958. Its totient is φ = 139328.

The previous prime is 278671. The next prime is 278687. The reversal of 278672 is 276872.

It can be written as a sum of positive squares in only one way, i.e., 274576 + 4096 = 524^2 + 64^2 .

It is not an unprimeable number, because it can be changed into a prime (278671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8693 + ... + 8724.

2²⁷⁸⁶⁷² is an apocalyptic number.

It is an amenable number.

278672 is a deficient number, since it is larger than the sum of its proper divisors (261286).

278672 is a wasteful number, since it uses less digits than its factorization.

278672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17425 (or 17419 counting only the distinct ones).

The product of its digits is 9408, while the sum is 32.

The square root of 278672 is about 527.8939287395. The cubic root of 278672 is about 65.3177342554.

The spelling of 278672 in words is "two hundred seventy-eight thousand, six hundred seventy-two".