1097820560 has 40 divisors (see below), whose sum is σ = 2702579256. Its totient is φ = 413296640.

The previous prime is 1097820553. The next prime is 1097820587. The reversal of 1097820560 is 650287901.

It can be written as a sum of positive squares in 4 ways, for example, as 474019984 + 623800576 = 21772^2 + 24976^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402251 + ... + 404970.

Almost surely, 2^1097820560 is an apocalyptic number.

1097820560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1097820560 is an abundant number, since it is smaller than the sum of its proper divisors (1604758696).

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

1097820560 is a wasteful number, since it uses less digits than its factorization.

1097820560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807251 (or 807245 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 1097820560 is about 33133.3753185515. The cubic root of 1097820560 is about 1031.5979093784.

The spelling of 1097820560 in words is "one billion, ninety-seven million, eight hundred twenty thousand, five hundred sixty".