1097181948 has 12 divisors (see below), whose sum is σ = 2560091240. Its totient is φ = 365727312.

The previous prime is 1097181947. The next prime is 1097181971. The reversal of 1097181948 is 8491817901.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 1097181897 and 1097181906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1097181947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45715903 + ... + 45715926.

Almost surely, 2^1097181948 is an apocalyptic number.

It is an amenable number.

1097181948 is an abundant number, since it is smaller than the sum of its proper divisors (1462909292).

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

1097181948 is a wasteful number, since it uses less digits than its factorization.

1097181948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91431836 (or 91431834 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 48.

The square root of 1097181948 is about 33123.7369268626. The cubic root of 1097181948 is about 1031.3978406814.

The spelling of 1097181948 in words is "one billion, ninety-seven million, one hundred eighty-one thousand, nine hundred forty-eight".