1098577728 has 84 divisors (see below), whose sum is σ = 3265545920. Its totient is φ = 366187392.

The previous prime is 1098577691. The next prime is 1098577747. The reversal of 1098577728 is 8277758901.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19768 + ... + 50871.

Almost surely, 2^1098577728 is an apocalyptic number.

1098577728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1098577728 is an abundant number, since it is smaller than the sum of its proper divisors (2166968192).

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

1098577728 is an frugal number, since it uses more digits than its factorization.

1098577728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70666 (or 70644 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 54.

The square root of 1098577728 is about 33144.7994110690. The cubic root of 1098577728 is about 1031.8350195977.

The spelling of 1098577728 in words is "one billion, ninety-eight million, five hundred seventy-seven thousand, seven hundred twenty-eight".