1089270864 has 120 divisors (see below), whose sum is σ = 3338348832. Its totient is φ = 328815360.

The previous prime is 1089270841. The next prime is 1089270913. The reversal of 1089270864 is 4680729801.

It is a super-2 number, since 2×1089270864² = 2373022030318612992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 462939 + ... + 465285.

Almost surely, 2^1089270864 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 1089270864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1669174416).

1089270864 is an abundant number, since it is smaller than the sum of its proper divisors (2249077968).

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

1089270864 is a wasteful number, since it uses less digits than its factorization.

1089270864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2665 (or 2656 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 1089270864 is about 33004.1037448376. The cubic root of 1089270864 is about 1028.9129399041.

It can be divided in two parts, 1089 and 270864, that added together give a triangular number (271953 = T₇₃₇).

The spelling of 1089270864 in words is "one billion, eighty-nine million, two hundred seventy thousand, eight hundred sixty-four".