1028620906 has 16 divisors (see below), whose sum is σ = 1557718344. Its totient is φ = 509405184.

The previous prime is 1028620877. The next prime is 1028620907. The reversal of 1028620906 is 6090268201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 508096681 + 520524225 = 22541^2 + 22815^2 .

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 7 ways as a sum of consecutive naturals, for example, 84220 + ... + 95656.

Almost surely, 2^1028620906 is an apocalyptic number.

1028620906 is a deficient number, since it is larger than the sum of its proper divisors (529097438).

1028620906 is a wasteful number, since it uses less digits than its factorization.

1028620906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11865.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 1028620906 is about 32072.1203851570. The cubic root of 1028620906 is about 1009.4507048127.

The spelling of 1028620906 in words is "one billion, twenty-eight million, six hundred twenty thousand, nine hundred six".