1028203634 has 8 divisors (see below), whose sum is σ = 1557576108. Its totient is φ = 509011600.

The previous prime is 1028203609. The next prime is 1028203651. The reversal of 1028203634 is 4363028201.

It can be written as a sum of positive squares in 2 ways, for example, as 986148409 + 42055225 = 31403^2 + 6485^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1028203597 and 1028203606.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2544857 + ... + 2545260.

Almost surely, 2^1028203634 is an apocalyptic number.

1028203634 is a deficient number, since it is larger than the sum of its proper divisors (529372474).

1028203634 is a wasteful number, since it uses less digits than its factorization.

1028203634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5090220.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 1028203634 is about 32065.6145114981. The cubic root of 1028203634 is about 1009.3141878893.

The spelling of 1028203634 in words is "one billion, twenty-eight million, two hundred three thousand, six hundred thirty-four".