1878728511 has 16 divisors (see below), whose sum is σ = 2770133760. Its totient is φ = 1123024320.

The previous prime is 1878728507. The next prime is 1878728519. The reversal of 1878728511 is 1158278781.

It is not a de Polignac number, because 1878728511 - 2² = 1878728507 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1878728519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 387531 + ... + 392348.

It is an arithmetic number, because the mean of its divisors is an integer number (173133360).

Almost surely, 2^1878728511 is an apocalyptic number.

1878728511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1878728511 is a deficient number, since it is larger than the sum of its proper divisors (891405249).

1878728511 is a wasteful number, since it uses less digits than its factorization.

1878728511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779966.

The product of its digits is 250880, while the sum is 48.

The square root of 1878728511 is about 43344.3019438542. The cubic root of 1878728511 is about 1233.9228558765.

The spelling of 1878728511 in words is "one billion, eight hundred seventy-eight million, seven hundred twenty-eight thousand, five hundred eleven".