2878291557 has 32 divisors (see below), whose sum is σ = 4440960000. Its totient is φ = 1840184640.

The previous prime is 2878291543. The next prime is 2878291597. The reversal of 2878291557 is 7551928782.

2878291557 is a `hidden beast` number, since 2 + 8 + 7 + 82 + 9 + 1 + 557 = 666.

It is not a de Polignac number, because 2878291557 - 2⁴ = 2878291541 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2878291517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104332 + ... + 129002.

It is an arithmetic number, because the mean of its divisors is an integer number (138780000).

Almost surely, 2^2878291557 is an apocalyptic number.

2878291557 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2878291557 is a deficient number, since it is larger than the sum of its proper divisors (1562668443).

2878291557 is a wasteful number, since it uses less digits than its factorization.

2878291557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24858 (or 24852 counting only the distinct ones).

The product of its digits is 2822400, while the sum is 54.

The square root of 2878291557 is about 53649.7116208466. The cubic root of 2878291557 is about 1422.4759351544.

The spelling of 2878291557 in words is "two billion, eight hundred seventy-eight million, two hundred ninety-one thousand, five hundred fifty-seven".