1587772878 has 16 divisors (see below), whose sum is σ = 3181133520. Its totient is φ = 528326336.

The previous prime is 1587772861. The next prime is 1587772891. The reversal of 1587772878 is 8782777851.

It is a super-2 number, since 2×1587772878² = 5042045424224805768, 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 in 7 ways as a sum of consecutive naturals, for example, 229125 + ... + 235952.

It is an arithmetic number, because the mean of its divisors is an integer number (198820845).

Almost surely, 2^1587772878 is an apocalyptic number.

1587772878 is an abundant number, since it is smaller than the sum of its proper divisors (1593360642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1587772878 is a wasteful number, since it uses less digits than its factorization.

1587772878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465651.

The product of its digits is 12293120, while the sum is 60.

The square root of 1587772878 is about 39846.8678568341. The cubic root of 1587772878 is about 1166.6201133896.

The spelling of 1587772878 in words is "one billion, five hundred eighty-seven million, seven hundred seventy-two thousand, eight hundred seventy-eight".