1378028115 has 48 divisors (see below), whose sum is σ = 2413547136. Its totient is φ = 727315200.

The previous prime is 1378028101. The next prime is 1378028117. The reversal of 1378028115 is 5118208731.

1378028115 is a `hidden beast` number, since 1 + 378 + 0 + 281 + 1 + 5 = 666.

It is not a de Polignac number, because 1378028115 - 2²⁹ = 841157203 is a prime.

It is a super-2 number, since 2×1378028115² = 3797922971460906450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1378028115.

It is not an unprimeable number, because it can be changed into a prime (1378028117) 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, 2988985 + ... + 2989445.

It is an arithmetic number, because the mean of its divisors is an integer number (50282232).

Almost surely, 2^1378028115 is an apocalyptic number.

1378028115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1378028115 is a deficient number, since it is larger than the sum of its proper divisors (1035519021).

1378028115 is a wasteful number, since it uses less digits than its factorization.

1378028115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020 (or 1017 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

The square root of 1378028115 is about 37121.8010743013. The cubic root of 1378028115 is about 1112.8057458685.

The spelling of 1378028115 in words is "one billion, three hundred seventy-eight million, twenty-eight thousand, one hundred fifteen".