1087267320 has 128 divisors (see below), whose sum is σ = 3653222400. Its totient is φ = 287618688.

The previous prime is 1087267319. The next prime is 1087267327. The reversal of 1087267320 is 237627801.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1087267327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133197 + ... + 141123.

It is an arithmetic number, because the mean of its divisors is an integer number (28540800).

Almost surely, 2^1087267320 is an apocalyptic number.

1087267320 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 1087267320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1826611200).

1087267320 is an abundant number, since it is smaller than the sum of its proper divisors (2565955080).

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

1087267320 is a wasteful number, since it uses less digits than its factorization.

1087267320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8074 (or 8064 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 1087267320 is about 32973.7368219012. The cubic root of 1087267320 is about 1028.2817110617.

The spelling of 1087267320 in words is "one billion, eighty-seven million, two hundred sixty-seven thousand, three hundred twenty".