1278482290 has 8 divisors (see below), whose sum is σ = 2301268140. Its totient is φ = 511392912.

The previous prime is 1278482251. The next prime is 1278482299. The reversal of 1278482290 is 922848721.

It can be written as a sum of positive squares in 2 ways, for example, as 1207771009 + 70711281 = 34753^2 + 8409^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1278482299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63924105 + ... + 63924124.

Almost surely, 2^1278482290 is an apocalyptic number.

1278482290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1278482290 is a deficient number, since it is larger than the sum of its proper divisors (1022785850).

1278482290 is a wasteful number, since it uses less digits than its factorization.

1278482290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127848236.

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 1278482290 is about 35755.8707067804. The cubic root of 1278482290 is about 1085.3377416284.

The spelling of 1278482290 in words is "one billion, two hundred seventy-eight million, four hundred eighty-two thousand, two hundred ninety".