278130082 has 4 divisors (see below), whose sum is σ = 417195126. Its totient is φ = 139065040.

The previous prime is 278130079. The next prime is 278130091. The reversal of 278130082 is 280031872.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 274929561 + 3200521 = 16581^2 + 1789^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69532519 + ... + 69532522.

Almost surely, 2^278130082 is an apocalyptic number.

278130082 is a deficient number, since it is larger than the sum of its proper divisors (139065044).

278130082 is a wasteful number, since it uses less digits than its factorization.

278130082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139065043.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 278130082 is about 16677.2324442636. The cubic root of 278130082 is about 652.7536685392.

The spelling of 278130082 in words is "two hundred seventy-eight million, one hundred thirty thousand, eighty-two".