1097515320 has 128 divisors (see below), whose sum is σ = 3707873280. Its totient is φ = 257472000.

The previous prime is 1097515319. The next prime is 1097515333. The reversal of 1097515320 is 235157901.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27510 + ... + 54330.

It is an arithmetic number, because the mean of its divisors is an integer number (28967760).

Almost surely, 2^1097515320 is an apocalyptic number.

1097515320 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 1097515320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1853936640).

1097515320 is an abundant number, since it is smaller than the sum of its proper divisors (2610357960).

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

1097515320 is a wasteful number, since it uses less digits than its factorization.

1097515320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26877 (or 26873 counting only the distinct ones).

The product of its (nonzero) digits is 9450, while the sum is 33.

The square root of 1097515320 is about 33128.7687667381. The cubic root of 1097515320 is about 1031.5022914041.

The spelling of 1097515320 in words is "one billion, ninety-seven million, five hundred fifteen thousand, three hundred twenty".