2028658557 has 32 divisors (see below), whose sum is σ = 2923038720. Its totient is φ = 1247287680.

The previous prime is 2028658553. The next prime is 2028658609. The reversal of 2028658557 is 7558568202.

It is not a de Polignac number, because 2028658557 - 2² = 2028658553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2028658553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1838668 + ... + 1839770.

It is an arithmetic number, because the mean of its divisors is an integer number (91344960).

Almost surely, 2^2028658557 is an apocalyptic number.

It is an amenable number.

2028658557 is a deficient number, since it is larger than the sum of its proper divisors (894380163).

2028658557 is a wasteful number, since it uses less digits than its factorization.

2028658557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1953.

The product of its (nonzero) digits is 1344000, while the sum is 48.

The square root of 2028658557 is about 45040.6322890787. The cubic root of 2028658557 is about 1265.9104522762.

The spelling of 2028658557 in words is "two billion, twenty-eight million, six hundred fifty-eight thousand, five hundred fifty-seven".