1098799400 has 24 divisors (see below), whose sum is σ = 2554709070. Its totient is φ = 439519680.

The previous prime is 1098799399. The next prime is 1098799409. The reversal of 1098799400 is 49978901.

It can be written as a sum of positive squares in 3 ways, for example, as 787700356 + 311099044 = 28066^2 + 17638^2 .

It is not an unprimeable number, because it can be changed into a prime (1098799409) 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, 2746799 + ... + 2747198.

Almost surely, 2^1098799400 is an apocalyptic number.

1098799400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1098799400 is an abundant number, since it is smaller than the sum of its proper divisors (1455909670).

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

1098799400 is a wasteful number, since it uses less digits than its factorization.

1098799400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5494013 (or 5494004 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 1098799400 is about 33148.1432360849. The cubic root of 1098799400 is about 1031.9044164623.

The spelling of 1098799400 in words is "one billion, ninety-eight million, seven hundred ninety-nine thousand, four hundred".