1097805312 has 200 divisors, whose sum is σ = 3321345456. Its totient is φ = 360972288.

The previous prime is 1097805301. The next prime is 1097805323. The reversal of 1097805312 is 2135087901.

It is an interprime number because it is at equal distance from previous prime (1097805301) and next prime (1097805323).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4271488 + ... + 4271744.

Almost surely, 2^1097805312 is an apocalyptic number.

1097805312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1097805312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1660672728).

1097805312 is an abundant number, since it is smaller than the sum of its proper divisors (2223540144).

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

1097805312 is an equidigital number, since it uses as much as digits as its factorization.

1097805312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 1097805312 is about 33133.1452174405. The cubic root of 1097805312 is about 1031.5931332859.

The spelling of 1097805312 in words is "one billion, ninety-seven million, eight hundred five thousand, three hundred twelve".