1028898720 has 96 divisors (see below), whose sum is σ = 3601160640. Its totient is φ = 274371840.

The previous prime is 1028898713. The next prime is 1028898733. The reversal of 1028898720 is 278988201.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

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 15 ways as a sum of consecutive naturals, for example, 114766 + ... + 123405.

It is an arithmetic number, because the mean of its divisors is an integer number (37512090).

Almost surely, 2^1028898720 is an apocalyptic number.

1028898720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1028898720 is an abundant number, since it is smaller than the sum of its proper divisors (2572261920).

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

1028898720 is a wasteful number, since it uses less digits than its factorization.

1028898720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238195 (or 238181 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 1028898720 is about 32076.4511752781. The cubic root of 1028898720 is about 1009.5415754444.

The spelling of 1028898720 in words is "one billion, twenty-eight million, eight hundred ninety-eight thousand, seven hundred twenty".