1028649960 has 96 divisors (see below), whose sum is σ = 3600291240. Its totient is φ = 253204992.

The previous prime is 1028649899. The next prime is 1028649989. The reversal of 1028649960 is 699468201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 259918884 + 768731076 = 16122^2 + 27726^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 105219 + ... + 114578.

Almost surely, 2^1028649960 is an apocalyptic number.

1028649960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1028649960 is an abundant number, since it is smaller than the sum of its proper divisors (2571641280).

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

1028649960 is a wasteful number, since it uses less digits than its factorization.

1028649960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219827 (or 219820 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 1028649960 is about 32072.5733298717. The cubic root of 1028649960 is about 1009.4602088987.

The spelling of 1028649960 in words is "one billion, twenty-eight million, six hundred forty-nine thousand, nine hundred sixty".