1957277138 has 8 divisors (see below), whose sum is σ = 3063564288. Its totient is φ = 936089044.

The previous prime is 1957277131. The next prime is 1957277141. The reversal of 1957277138 is 8317727591.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1957277131) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 21274706 + ... + 21274797.

It is an arithmetic number, because the mean of its divisors is an integer number (382945536).

Almost surely, 2^1957277138 is an apocalyptic number.

1957277138 is a deficient number, since it is larger than the sum of its proper divisors (1106287150).

1957277138 is a wasteful number, since it uses less digits than its factorization.

1957277138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42549528.

The product of its digits is 740880, while the sum is 50.

The square root of 1957277138 is about 44241.1249630929. The cubic root of 1957277138 is about 1250.8851624820.

The spelling of 1957277138 in words is "one billion, nine hundred fifty-seven million, two hundred seventy-seven thousand, one hundred thirty-eight".