1957016387 has 48 divisors (see below), whose sum is σ = 2287498752. Its totient is φ = 1668817920.

The previous prime is 1957016317. The next prime is 1957016407. The reversal of 1957016387 is 7836107591.

It is not a de Polignac number, because 1957016387 - 2¹⁰ = 1957015363 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1957016317) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11718578 + ... + 11718744.

It is an arithmetic number, because the mean of its divisors is an integer number (47656224).

Almost surely, 2^1957016387 is an apocalyptic number.

1957016387 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1957016387 is a deficient number, since it is larger than the sum of its proper divisors (330482365).

1957016387 is a wasteful number, since it uses less digits than its factorization.

1957016387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 1957016387 is about 44238.1779349014. The cubic root of 1957016387 is about 1250.8296118336.

The spelling of 1957016387 in words is "one billion, nine hundred fifty-seven million, sixteen thousand, three hundred eighty-seven".