1779478998 has 48 divisors (see below), whose sum is σ = 3959178048. Its totient is φ = 532721200.

The previous prime is 1779478937. The next prime is 1779479003. The reversal of 1779478998 is 8998749771.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45493 + ... + 75023.

It is an arithmetic number, because the mean of its divisors is an integer number (82482876).

Almost surely, 2^1779478998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1779478998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1979589024).

1779478998 is an abundant number, since it is smaller than the sum of its proper divisors (2179699050).

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

1779478998 is a wasteful number, since it uses less digits than its factorization.

1779478998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29641 (or 29630 counting only the distinct ones).

The product of its digits is 64012032, while the sum is 69.

The square root of 1779478998 is about 42183.8713017191. The cubic root of 1779478998 is about 1211.8000206493.

The spelling of 1779478998 in words is "one billion, seven hundred seventy-nine million, four hundred seventy-eight thousand, nine hundred ninety-eight".