1097940042 has 64 divisors (see below), whose sum is σ = 2580048000. Its totient is φ = 345129984.

The previous prime is 1097940031. The next prime is 1097940043. The reversal of 1097940042 is 2400497901.

It is a junction number, because it is equal to n+sod(n) for n = 1097939979 and 1097940006.

It is not an unprimeable number, because it can be changed into a prime (1097940043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 232618 + ... + 237290.

It is an arithmetic number, because the mean of its divisors is an integer number (40313250).

Almost surely, 2^1097940042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1097940042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1290024000).

1097940042 is an abundant number, since it is smaller than the sum of its proper divisors (1482107958).

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

1097940042 is a wasteful number, since it uses less digits than its factorization.

1097940042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4932 (or 4926 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 1097940042 is about 33135.1783155003. The cubic root of 1097940042 is about 1031.6353328926.

The spelling of 1097940042 in words is "one billion, ninety-seven million, nine hundred forty thousand, forty-two".