1098187776 has 264 divisors, whose sum is σ = 3755344320. Its totient is φ = 302432256.

The previous prime is 1098187771. The next prime is 1098187781. The reversal of 1098187776 is 6777818901.

It is an interprime number because it is at equal distance from previous prime (1098187771) and next prime (1098187781).

It is not an unprimeable number, because it can be changed into a prime (1098187771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1870555 + ... + 1871141.

Almost surely, 2^1098187776 is an apocalyptic number.

1098187776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1098187776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1877672160).

1098187776 is an abundant number, since it is smaller than the sum of its proper divisors (2657156544).

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

1098187776 is a wasteful number, since it uses less digits than its factorization.

1098187776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649 (or 628 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 54.

The square root of 1098187776 is about 33138.9163371405. The cubic root of 1098187776 is about 1031.7129181639.

The spelling of 1098187776 in words is "one billion, ninety-eight million, one hundred eighty-seven thousand, seven hundred seventy-six".