1057105978 has 8 divisors (see below), whose sum is σ = 1591554420. Its totient is φ = 526587840.

The previous prime is 1057105943. The next prime is 1057105997. The reversal of 1057105978 is 8795017501.

It can be written as a sum of positive squares in 2 ways, for example, as 1056445009 + 660969 = 32503^2 + 813^2 .

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

It is a super-2 number, since 2×1057105978² = 2234946097446672968, which contains 22 as substring.

It is an unprimeable number.

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, 981903 + ... + 982978.

Almost surely, 2^1057105978 is an apocalyptic number.

1057105978 is a deficient number, since it is larger than the sum of its proper divisors (534448442).

1057105978 is a wasteful number, since it uses less digits than its factorization.

1057105978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965152.

The product of its (nonzero) digits is 88200, while the sum is 43.

The square root of 1057105978 is about 32513.1662253924. The cubic root of 1057105978 is about 1018.6840578191.

The spelling of 1057105978 in words is "one billion, fifty-seven million, one hundred five thousand, nine hundred seventy-eight".