1027878658 has 4 divisors (see below), whose sum is σ = 1541817990. Its totient is φ = 513939328.

The previous prime is 1027878647. The next prime is 1027878659. The reversal of 1027878658 is 8568787201.

It is a happy number.

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., 971132569 + 56746089 = 31163^2 + 7533^2 .

It is not an unprimeable number, because it can be changed into a prime (1027878659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256969663 + ... + 256969666.

Almost surely, 2^1027878658 is an apocalyptic number.

1027878658 is a deficient number, since it is larger than the sum of its proper divisors (513939332).

1027878658 is an equidigital number, since it uses as much as digits as its factorization.

1027878658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513939331.

The product of its (nonzero) digits is 1505280, while the sum is 52.

The square root of 1027878658 is about 32060.5467514202. The cubic root of 1027878658 is about 1009.2078414293.

The spelling of 1027878658 in words is "one billion, twenty-seven million, eight hundred seventy-eight thousand, six hundred fifty-eight".