1097928 has 128 divisors (see below), whose sum is σ = 3628800. Its totient is φ = 304128.

The previous prime is 1097923. The next prime is 1097933. The reversal of 1097928 is 8297901.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1097923) and next prime (1097933).

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

It is a junction number, because it is equal to n+sod(n) for n = 1097892 and 1097901.

It is not an unprimeable number, because it can be changed into a prime (1097923) 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, 47725 + ... + 47747.

It is an arithmetic number, because the mean of its divisors is an integer number (28350).

2^1097928 is an apocalyptic number.

1097928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1097928 is the 663-rd heptagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1097928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1814400).

1097928 is an abundant number, since it is smaller than the sum of its proper divisors (2530872).

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

1097928 is a wasteful number, since it uses less digits than its factorization.

1097928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 1097928 is about 1047.8205953311. The cubic root of 1097928 is about 103.1631561285.

It can be divided in two parts, 1097 and 928, that added together give a square (2025 = 45²).

The spelling of 1097928 in words is "one million, ninety-seven thousand, nine hundred twenty-eight".