1178538498 has 160 divisors (see below), whose sum is σ = 2985776640. Its totient is φ = 345254400.

The previous prime is 1178538461. The next prime is 1178538523. The reversal of 1178538498 is 8948358711.

1178538498 is a `hidden beast` number, since 1 + 17 + 8 + 538 + 4 + 98 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5284815 + ... + 5285037.

It is an arithmetic number, because the mean of its divisors is an integer number (18661104).

Almost surely, 2^1178538498 is an apocalyptic number.

1178538498 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1178538498, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1492888320).

1178538498 is an abundant number, since it is smaller than the sum of its proper divisors (1807238142).

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

1178538498 is a wasteful number, since it uses less digits than its factorization.

1178538498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 365 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 54.

The square root of 1178538498 is about 34329.8484995201. The cubic root of 1178538498 is about 1056.2853535405.

The spelling of 1178538498 in words is "one billion, one hundred seventy-eight million, five hundred thirty-eight thousand, four hundred ninety-eight".