1097017920 has 84 divisors (see below), whose sum is σ = 3773294460. Its totient is φ = 292537344.

The previous prime is 1097017919. The next prime is 1097017931. The reversal of 1097017920 is 297107901.

It can be written as a sum of positive squares in 2 ways, for example, as 681836544 + 415181376 = 26112^2 + 20376^2 .

It is a super-2 number, since 2×1097017920² = 2406896633602252800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 187575 + ... + 193334.

Almost surely, 2^1097017920 is an apocalyptic number.

1097017920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1097017920 is an abundant number, since it is smaller than the sum of its proper divisors (2676276540).

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

1097017920 is a wasteful number, since it uses less digits than its factorization.

1097017920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380932 (or 380919 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 36.

The square root of 1097017920 is about 33121.2608455656. The cubic root of 1097017920 is about 1031.3464403472.

The spelling of 1097017920 in words is "one billion, ninety-seven million, seventeen thousand, nine hundred twenty".