1090172520 has 160 divisors (see below), whose sum is σ = 3742675200. Its totient is φ = 284487552.

The previous prime is 1090172513. The next prime is 1090172521. The reversal of 1090172520 is 252710901.

It is a super-2 number, since 2×1090172520² = 2376952246726300800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1090172521) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 148701 + ... + 155859.

It is an arithmetic number, because the mean of its divisors is an integer number (23391720).

Almost surely, 2^1090172520 is an apocalyptic number.

1090172520 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 1090172520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1871337600).

1090172520 is an abundant number, since it is smaller than the sum of its proper divisors (2652502680).

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

1090172520 is a wasteful number, since it uses less digits than its factorization.

1090172520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7229 (or 7216 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 1090172520 is about 33017.7606751276. The cubic root of 1090172520 is about 1029.1967596272.

The spelling of 1090172520 in words is "one billion, ninety million, one hundred seventy-two thousand, five hundred twenty".