1089777888 has 60 divisors (see below), whose sum is σ = 3205014120. Its totient is φ = 363258432.

The previous prime is 1089777883. The next prime is 1089777893. The reversal of 1089777888 is 8887779801.

It is an interprime number because it is at equal distance from previous prime (1089777883) and next prime (1089777893).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089777883) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 207628 + ... + 212811.

It is an arithmetic number, because the mean of its divisors is an integer number (53416902).

Almost surely, 2^1089777888 is an apocalyptic number.

1089777888 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1089777888 is an abundant number, since it is smaller than the sum of its proper divisors (2115236232).

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

1089777888 is an equidigital number, since it uses as much as digits as its factorization.

1089777888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420461 (or 420444 counting only the distinct ones).

The product of its (nonzero) digits is 12644352, while the sum is 63.

The square root of 1089777888 is about 33011.7840778108. The cubic root of 1089777888 is about 1029.0725581863.

The spelling of 1089777888 in words is "one billion, eighty-nine million, seven hundred seventy-seven thousand, eight hundred eighty-eight".