1028622816 has 72 divisors (see below), whose sum is σ = 3150168840. Its totient is φ = 316498176.

The previous prime is 1028622799. The next prime is 1028622821. The reversal of 1028622816 is 6182268201.

1028622816 is a `hidden beast` number, since 1 + 0 + 28 + 622 + 8 + 1 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133626 + ... + 141113.

It is an arithmetic number, because the mean of its divisors is an integer number (43752345).

Almost surely, 2^1028622816 is an apocalyptic number.

1028622816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1028622816 is an abundant number, since it is smaller than the sum of its proper divisors (2121546024).

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

1028622816 is a wasteful number, since it uses less digits than its factorization.

1028622816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274768 (or 274757 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 1028622816 is about 32072.1501617837. The cubic root of 1028622816 is about 1009.4513296136.

The spelling of 1028622816 in words is "one billion, twenty-eight million, six hundred twenty-two thousand, eight hundred sixteen".