1779402798 has 48 divisors (see below), whose sum is σ = 3944655936. Its totient is φ = 579445440.

The previous prime is 1779402787. The next prime is 1779402811. The reversal of 1779402798 is 8972049771.

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, 550828 + ... + 554048.

It is an arithmetic number, because the mean of its divisors is an integer number (82180332).

Almost surely, 2^1779402798 is an apocalyptic number.

1779402798 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1779402798 is an abundant number, since it is smaller than the sum of its proper divisors (2165253138).

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

1779402798 is a wasteful number, since it uses less digits than its factorization.

1779402798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3929 (or 3926 counting only the distinct ones).

The product of its (nonzero) digits is 1778112, while the sum is 54.

The square root of 1779402798 is about 42182.9681032523. The cubic root of 1779402798 is about 1211.7827233618.

The spelling of 1779402798 in words is "one billion, seven hundred seventy-nine million, four hundred two thousand, seven hundred ninety-eight".