1978288527 has 16 divisors (see below), whose sum is σ = 2657249280. Its totient is φ = 1309128672.

The previous prime is 1978288523. The next prime is 1978288687. The reversal of 1978288527 is 7258828791.

It is not a de Polignac number, because 1978288527 - 2² = 1978288523 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1978288523) 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, 236053 + ... + 244289.

It is an arithmetic number, because the mean of its divisors is an integer number (166078080).

Almost surely, 2^1978288527 is an apocalyptic number.

1978288527 is a deficient number, since it is larger than the sum of its proper divisors (678960753).

1978288527 is a wasteful number, since it uses less digits than its factorization.

1978288527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8822.

The product of its digits is 4515840, while the sum is 57.

The square root of 1978288527 is about 44477.9555173122. The cubic root of 1978288527 is about 1255.3453284818.

The spelling of 1978288527 in words is "one billion, nine hundred seventy-eight million, two hundred eighty-eight thousand, five hundred twenty-seven".