1798226990 has 24 divisors (see below), whose sum is σ = 3765268152. Its totient is φ = 616534800.

The previous prime is 1798226981. The next prime is 1798227007. The reversal of 1798226990 is 996228971.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1834436 + ... + 1835415.

It is an arithmetic number, because the mean of its divisors is an integer number (156886173).

Almost surely, 2^1798226990 is an apocalyptic number.

1798226990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1798226990 is an abundant number, since it is smaller than the sum of its proper divisors (1967041162).

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

1798226990 is a wasteful number, since it uses less digits than its factorization.

1798226990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3669872 (or 3669865 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 1798226990 is about 42405.5065999688. The cubic root of 1798226990 is about 1216.0408677220.

The spelling of 1798226990 in words is "one billion, seven hundred ninety-eight million, two hundred twenty-six thousand, nine hundred ninety".