1097811620 has 24 divisors (see below), whose sum is σ = 2405640384. Its totient is φ = 420032096.

The previous prime is 1097811581. The next prime is 1097811623. The reversal of 1097811620 is 261187901.

It is not an unprimeable number, because it can be changed into a prime (1097811623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1192814 + ... + 1193733.

It is an arithmetic number, because the mean of its divisors is an integer number (100235016).

Almost surely, 2^1097811620 is an apocalyptic number.

1097811620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1097811620 is an abundant number, since it is smaller than the sum of its proper divisors (1307828764).

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

1097811620 is a wasteful number, since it uses less digits than its factorization.

1097811620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2386579 (or 2386577 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 35.

The square root of 1097811620 is about 33133.2404089911. The cubic root of 1097811620 is about 1031.5951091301.

The spelling of 1097811620 in words is "one billion, ninety-seven million, eight hundred eleven thousand, six hundred twenty".