1027721378 has 8 divisors (see below), whose sum is σ = 1550493468. Its totient is φ = 510890224.

The previous prime is 1027721377. The next prime is 1027721407. The reversal of 1027721378 is 8731277201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 744034729 + 283686649 = 27277^2 + 16843^2 .

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

It is a super-2 number, since 2×1027721378² = 2112422461596437768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1027721377) 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 in 3 ways as a sum of consecutive naturals, for example, 1484801 + ... + 1485492.

Almost surely, 2^1027721378 is an apocalyptic number.

1027721378 is a deficient number, since it is larger than the sum of its proper divisors (522772090).

1027721378 is a wasteful number, since it uses less digits than its factorization.

1027721378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2970468.

The product of its (nonzero) digits is 32928, while the sum is 38.

The square root of 1027721378 is about 32058.0937986026. The cubic root of 1027721378 is about 1009.1563644368.

Adding to 1027721378 its reverse (8731277201), we get a palindrome (9758998579).

The spelling of 1027721378 in words is "one billion, twenty-seven million, seven hundred twenty-one thousand, three hundred seventy-eight".