1957899216 has 160 divisors (see below), whose sum is σ = 6290652928. Its totient is φ = 510935040.

The previous prime is 1957899193. The next prime is 1957899217. The reversal of 1957899216 is 6129987591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1957899217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 421386 + ... + 426006.

Almost surely, 2^1957899216 is an apocalyptic number.

1957899216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1957899216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3145326464).

1957899216 is an abundant number, since it is smaller than the sum of its proper divisors (4332753712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1957899216 is a wasteful number, since it uses less digits than its factorization.

1957899216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4749 (or 4743 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 57.

The square root of 1957899216 is about 44248.1549445850. The cubic root of 1957899216 is about 1251.0176706656.

The spelling of 1957899216 in words is "one billion, nine hundred fifty-seven million, eight hundred ninety-nine thousand, two hundred sixteen".