1097898 has 16 divisors (see below), whose sum is σ = 2249856. Its totient is φ = 356960.

The previous prime is 1097897. The next prime is 1097903. The reversal of 1097898 is 8987901.

It is not an unprimeable number, because it can be changed into a prime (1097891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1986 + ... + 2477.

It is an arithmetic number, because the mean of its divisors is an integer number (140616).

2^1097898 is an apocalyptic number.

1097898 is an abundant number, since it is smaller than the sum of its proper divisors (1151958).

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

1097898 is a wasteful number, since it uses less digits than its factorization.

1097898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4509.

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 1097898 is about 1047.8062798056. The cubic root of 1097898 is about 103.1622165031.

The spelling of 1097898 in words is "one million, ninety-seven thousand, eight hundred ninety-eight".