1057868390 has 16 divisors (see below), whose sum is σ = 1905473808. Its totient is φ = 422856096.

The previous prime is 1057868389. The next prime is 1057868431. The reversal of 1057868390 is 938687501.

It is a happy number.

It is a super-2 number, since 2×1057868390² = 2238171061122384200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20837 + ... + 50496.

It is an arithmetic number, because the mean of its divisors is an integer number (119092113).

Almost surely, 2^1057868390 is an apocalyptic number.

1057868390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1057868390 is a deficient number, since it is larger than the sum of its proper divisors (847605418).

1057868390 is a wasteful number, since it uses less digits than its factorization.

1057868390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72823.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 1057868390 is about 32524.8887776730. Note that the first 3 decimals coincide. The cubic root of 1057868390 is about 1018.9288993411.

Subtracting from 1057868390 its reverse (938687501), we obtain a square (119180889 = 10917²).

The spelling of 1057868390 in words is "one billion, fifty-seven million, eight hundred sixty-eight thousand, three hundred ninety".