278230464 has 140 divisors (see below), whose sum is σ = 832030848. Its totient is φ = 91929600.

The previous prime is 278230453. The next prime is 278230493. The reversal of 278230464 is 464032872.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 990004 + ... + 990284.

Almost surely, 2^278230464 is an apocalyptic number.

278230464 is a gapful number since it is divisible by the number (24) 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 278230464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (416015424).

278230464 is an abundant number, since it is smaller than the sum of its proper divisors (553800384).

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

278230464 is a wasteful number, since it uses less digits than its factorization.

278230464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496 (or 477 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 278230464 is about 16680.2417248672. The cubic root of 278230464 is about 652.8321891567.

The spelling of 278230464 in words is "two hundred seventy-eight million, two hundred thirty thousand, four hundred sixty-four".