1028622815 has 24 divisors (see below), whose sum is σ = 1379805840. Its totient is φ = 735384320.

The previous prime is 1028622799. The next prime is 1028622821. The reversal of 1028622815 is 5182268201.

It is a happy number.

It is not a de Polignac number, because 1028622815 - 2⁴ = 1028622799 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21287 + ... + 50103.

It is an arithmetic number, because the mean of its divisors is an integer number (57491910).

Almost surely, 2^1028622815 is an apocalyptic number.

1028622815 is a deficient number, since it is larger than the sum of its proper divisors (351183025).

1028622815 is a wasteful number, since it uses less digits than its factorization.

1028622815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28903 (or 28892 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 1028622815 is about 32072.1501461938. The cubic root of 1028622815 is about 1009.4513292865.

The spelling of 1028622815 in words is "one billion, twenty-eight million, six hundred twenty-two thousand, eight hundred fifteen".