1097726520 has 384 divisors, whose sum is σ = 3998937600. Its totient is φ = 239754240.

The previous prime is 1097726503. The next prime is 1097726549. The reversal of 1097726520 is 256277901.

1097726520 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1097726520² = 2410007025422620800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6345154 + ... + 6345326.

It is an arithmetic number, because the mean of its divisors is an integer number (10413900).

Almost surely, 2^1097726520 is an apocalyptic number.

1097726520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1097726520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1999468800).

1097726520 is an abundant number, since it is smaller than the sum of its proper divisors (2901211080).

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

1097726520 is a wasteful number, since it uses less digits than its factorization.

1097726520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 39.

The square root of 1097726520 is about 33131.9561752698. The cubic root of 1097726520 is about 1031.5684527619.

The spelling of 1097726520 in words is "one billion, ninety-seven million, seven hundred twenty-six thousand, five hundred twenty".