1147878915 has 8 divisors (see below), whose sum is σ = 1836606288. Its totient is φ = 612202080.

The previous prime is 1147878877. The next prime is 1147878971. The reversal of 1147878915 is 5198787411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1147878915 - 2¹⁰ = 1147877891 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38262616 + ... + 38262645.

It is an arithmetic number, because the mean of its divisors is an integer number (229575786).

Almost surely, 2^1147878915 is an apocalyptic number.

1147878915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1147878915 is a deficient number, since it is larger than the sum of its proper divisors (688727373).

1147878915 is an equidigital number, since it uses as much as digits as its factorization.

1147878915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76525269.

The product of its digits is 564480, while the sum is 51.

The square root of 1147878915 is about 33880.3617896858. The cubic root of 1147878915 is about 1047.0450296221.

The spelling of 1147878915 in words is "one billion, one hundred forty-seven million, eight hundred seventy-eight thousand, nine hundred fifteen".