1097942780 has 24 divisors (see below), whose sum is σ = 2515287600. Its totient is φ = 399251840.

The previous prime is 1097942777. The next prime is 1097942831. The reversal of 1097942780 is 872497901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2495105 + ... + 2495544.

It is an arithmetic number, because the mean of its divisors is an integer number (104803650).

Almost surely, 2^1097942780 is an apocalyptic number.

1097942780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1097942780 is an abundant number, since it is smaller than the sum of its proper divisors (1417344820).

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

1097942780 is a wasteful number, since it uses less digits than its factorization.

1097942780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4990669 (or 4990667 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 47.

The square root of 1097942780 is about 33135.2196310814. The cubic root of 1097942780 is about 1031.6361904426.

The spelling of 1097942780 in words is "one billion, ninety-seven million, nine hundred forty-two thousand, seven hundred eighty".