278532045 has 24 divisors (see below), whose sum is σ = 526679712. Its totient is φ = 135045600.

The previous prime is 278531999. The next prime is 278532101. The reversal of 278532045 is 540235872.

It is not a de Polignac number, because 278532045 - 2⁸ = 278531789 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 280851 + ... + 281840.

It is an arithmetic number, because the mean of its divisors is an integer number (21944988).

Almost surely, 2^278532045 is an apocalyptic number.

It is an amenable number.

278532045 is a deficient number, since it is larger than the sum of its proper divisors (248147667).

278532045 is a wasteful number, since it uses less digits than its factorization.

278532045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562713 (or 562710 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 278532045 is about 16689.2793433389. The cubic root of 278532045 is about 653.0679777297.

The spelling of 278532045 in words is "two hundred seventy-eight million, five hundred thirty-two thousand, forty-five".