1028650400 has 36 divisors (see below), whose sum is σ = 2511194742. Its totient is φ = 411459840.

The previous prime is 1028650393. The next prime is 1028650409. The reversal of 1028650400 is 40568201.

It can be written as a sum of positive squares in 3 ways, for example, as 636451984 + 392198416 = 25228^2 + 19804^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1028650400.

It is not an unprimeable number, because it can be changed into a prime (1028650409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 642107 + ... + 643706.

Almost surely, 2^1028650400 is an apocalyptic number.

1028650400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1028650400 is an abundant number, since it is smaller than the sum of its proper divisors (1482544342).

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

1028650400 is a wasteful number, since it uses less digits than its factorization.

1028650400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285833 (or 1285820 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 1028650400 is about 32072.5801893144. The cubic root of 1028650400 is about 1009.4603528293.

The spelling of 1028650400 in words is "one billion, twenty-eight million, six hundred fifty thousand, four hundred".