1797122420 has 12 divisors (see below), whose sum is σ = 3773957124. Its totient is φ = 718848960.

The previous prime is 1797122413. The next prime is 1797122497. The reversal of 1797122420 is 242217971.

It can be written as a sum of positive squares in 2 ways, for example, as 267060964 + 1530061456 = 16342^2 + 39116^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44928041 + ... + 44928080.

It is an arithmetic number, because the mean of its divisors is an integer number (314496427).

Almost surely, 2^1797122420 is an apocalyptic number.

1797122420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1797122420 is an abundant number, since it is smaller than the sum of its proper divisors (1976834704).

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

1797122420 is a wasteful number, since it uses less digits than its factorization.

1797122420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89856130 (or 89856128 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 1797122420 is about 42392.4807011810. The cubic root of 1797122420 is about 1215.7918303117.

The spelling of 1797122420 in words is "one billion, seven hundred ninety-seven million, one hundred twenty-two thousand, four hundred twenty".