2528634986 has 4 divisors (see below), whose sum is σ = 3792952482. Its totient is φ = 1264317492.

The previous prime is 2528634959. The next prime is 2528634989. The reversal of 2528634986 is 6894368252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1748494225 + 780140761 = 41815^2 + 27931^2 .

It is not an unprimeable number, because it can be changed into a prime (2528634989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632158745 + ... + 632158748.

Almost surely, 2^2528634986 is an apocalyptic number.

2528634986 is a deficient number, since it is larger than the sum of its proper divisors (1264317496).

2528634986 is a wasteful number, since it uses less digits than its factorization.

2528634986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264317495.

The product of its digits is 4976640, while the sum is 53.

The square root of 2528634986 is about 50285.5345601496. The cubic root of 2528634986 is about 1362.3709697523.

The spelling of 2528634986 in words is "two billion, five hundred twenty-eight million, six hundred thirty-four thousand, nine hundred eighty-six".