1019091088 has 40 divisors (see below), whose sum is σ = 2047636800. Its totient is φ = 490756224.

The previous prime is 1019091079. The next prime is 1019091091. The reversal of 1019091088 is 8801909101.

It is a happy number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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, 201195 + ... + 206197.

It is an arithmetic number, because the mean of its divisors is an integer number (51190920).

Almost surely, 2^1019091088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1019091088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1023818400).

1019091088 is an abundant number, since it is smaller than the sum of its proper divisors (1028545712).

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

1019091088 is a wasteful number, since it uses less digits than its factorization.

1019091088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5479 (or 5473 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 37.

The square root of 1019091088 is about 31923.2061046506. The cubic root of 1019091088 is about 1006.3236234957.

The spelling of 1019091088 in words is "one billion, nineteen million, ninety-one thousand, eighty-eight".