3857130878 has 4 divisors (see below), whose sum is σ = 5785696320. Its totient is φ = 1928565438.

The previous prime is 3857130859. The next prime is 3857130881. The reversal of 3857130878 is 8780317583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8780317583 = 4703 ⋅1866961.

It is a super-2 number, since 2×3857130878² = 29754917220042101768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 964282718 + ... + 964282721.

It is an arithmetic number, because the mean of its divisors is an integer number (1446424080).

Almost surely, 2^3857130878 is an apocalyptic number.

3857130878 is a deficient number, since it is larger than the sum of its proper divisors (1928565442).

3857130878 is a wasteful number, since it uses less digits than its factorization.

3857130878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1928565441.

The product of its (nonzero) digits is 1128960, while the sum is 50.

The square root of 3857130878 is about 62105.8038994746. The cubic root of 3857130878 is about 1568.2722521911.

The spelling of 3857130878 in words is "three billion, eight hundred fifty-seven million, one hundred thirty thousand, eight hundred seventy-eight".