278997352804 has 9 divisors (see below), whose sum is σ = 488247216121. Its totient is φ = 139498148200.

The previous prime is 278997352757. The next prime is 278997352807. The reversal of 278997352804 is 408253799872.

It is a happy number.

The square root of 278997352804 is 528202.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 77396352804 + 201601000000 = 278202^2 + 449000^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (278997352807) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 924354 + ... + 1188454.

Almost surely, 2^278997352804 is an apocalyptic number.

278997352804 is the 528202-nd square number.

It is an amenable number.

278997352804 is a deficient number, since it is larger than the sum of its proper divisors (209249863317).

278997352804 is an frugal number, since it uses more digits than its factorization.

278997352804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528206 (or 264103 counting only the distinct ones).

The product of its (nonzero) digits is 60963840, while the sum is 64.

Multiplying 278997352804 by its sum of digits (64), we get a square (17855830579456 = 4225616²).

The spelling of 278997352804 in words is "two hundred seventy-eight billion, nine hundred ninety-seven million, three hundred fifty-two thousand, eight hundred four".