278652253 has 8 divisors (see below), whose sum is σ = 321865920. Its totient is φ = 238418880.

The previous prime is 278652247. The next prime is 278652281. The reversal of 278652253 is 352256872.

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

It is not a de Polignac number, because 278652253 - 2¹³ = 278644061 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 (278652203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 744873 + ... + 745246.

It is an arithmetic number, because the mean of its divisors is an integer number (40233240).

Almost surely, 2^278652253 is an apocalyptic number.

It is an amenable number.

278652253 is a deficient number, since it is larger than the sum of its proper divisors (43213667).

278652253 is a wasteful number, since it uses less digits than its factorization.

278652253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1490147.

The product of its digits is 201600, while the sum is 40.

The square root of 278652253 is about 16692.8803086825. The cubic root of 278652253 is about 653.1619139046.

The spelling of 278652253 in words is "two hundred seventy-eight million, six hundred fifty-two thousand, two hundred fifty-three".