1090742640 has 160 divisors (see below), whose sum is σ = 3692055360. Its totient is φ = 264757248.

The previous prime is 1090742629. The next prime is 1090742641. The reversal of 1090742640 is 462470901.

It is a happy number.

It is a super-3 number, since 3×1090742640³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1090742641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 225366 + ... + 230154.

It is an arithmetic number, because the mean of its divisors is an integer number (23075346).

Almost surely, 2^1090742640 is an apocalyptic number.

1090742640 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 1090742640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1846027680).

1090742640 is an abundant number, since it is smaller than the sum of its proper divisors (2601312720).

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

1090742640 is a wasteful number, since it uses less digits than its factorization.

1090742640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4891 (or 4885 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 1090742640 is about 33026.3930818974. The cubic root of 1090742640 is about 1029.3761390037.

The spelling of 1090742640 in words is "one billion, ninety million, seven hundred forty-two thousand, six hundred forty".