1000378457 has 8 divisors (see below), whose sum is σ = 1078440384. Its totient is φ = 922475088.

The previous prime is 1000378441. The next prime is 1000378469. The reversal of 1000378457 is 7548730001.

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

It is a cyclic number.

It is not a de Polignac number, because 1000378457 - 2⁴ = 1000378441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000378157) 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 7 ways as a sum of consecutive naturals, for example, 26363 + ... + 51920.

It is an arithmetic number, because the mean of its divisors is an integer number (134805048).

Almost surely, 2^1000378457 is an apocalyptic number.

It is an amenable number.

1000378457 is a deficient number, since it is larger than the sum of its proper divisors (78061927).

1000378457 is an equidigital number, since it uses as much as digits as its factorization.

1000378457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79279.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 1000378457 is about 31628.7599662080. The cubic root of 1000378457 is about 1000.1261364223.

The spelling of 1000378457 in words is "one billion, three hundred seventy-eight thousand, four hundred fifty-seven".