1028620908 has 72 divisors (see below), whose sum is σ = 2994351360. Its totient is φ = 291638880.

The previous prime is 1028620907. The next prime is 1028620913. The reversal of 1028620908 is 8090268201.

1028620908 is a `hidden beast` number, since 1 + 0 + 28 + 620 + 9 + 0 + 8 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (1028620907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17433 + ... + 48591.

Almost surely, 2^1028620908 is an apocalyptic number.

1028620908 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1028620908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1497175680).

1028620908 is an abundant number, since it is smaller than the sum of its proper divisors (1965730452).

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

1028620908 is a wasteful number, since it uses less digits than its factorization.

1028620908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31307 (or 31302 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 1028620908 is about 32072.1204163367. The cubic root of 1028620908 is about 1009.4507054670.

The spelling of 1028620908 in words is "one billion, twenty-eight million, six hundred twenty thousand, nine hundred eight".