278534256 has 480 divisors, whose sum is σ = 1063931904. Its totient is φ = 60825600.

The previous prime is 278534251. The next prime is 278534257. The reversal of 278534256 is 652435872.

It is a Harshad number since it is a multiple of its sum of digits (42).

Its product of digits (403200) is a multiple of the sum of its prime divisors (84).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278534251) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8984961 + ... + 8984991.

Almost surely, 2^278534256 is an apocalyptic number.

278534256 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 278534256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (531965952).

278534256 is an abundant number, since it is smaller than the sum of its proper divisors (785397648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

278534256 is a wasteful number, since it uses less digits than its factorization.

278534256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 84 counting only the distinct ones).

The product of its digits is 403200, while the sum is 42.

The square root of 278534256 is about 16689.3455833355. The cubic root of 278534256 is about 653.0697057528.

The spelling of 278534256 in words is "two hundred seventy-eight million, five hundred thirty-four thousand, two hundred fifty-six".