1028729898 has 24 divisors (see below), whose sum is σ = 2547331488. Its totient is φ = 293922792.

The previous prime is 1028729887. The next prime is 1028729899. The reversal of 1028729898 is 8989278201.

It is not an unprimeable number, because it can be changed into a prime (1028729899) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4082136 + ... + 4082387.

It is an arithmetic number, because the mean of its divisors is an integer number (106138812).

Almost surely, 2^1028729898 is an apocalyptic number.

1028729898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1028729898 is an abundant number, since it is smaller than the sum of its proper divisors (1518601590).

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

1028729898 is a wasteful number, since it uses less digits than its factorization.

1028729898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8164538 (or 8164535 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

The square root of 1028729898 is about 32073.8195106227. The cubic root of 1028729898 is about 1009.4863571328.

The spelling of 1028729898 in words is "one billion, twenty-eight million, seven hundred twenty-nine thousand, eight hundred ninety-eight".