1197685440 has 840 divisors, whose sum is σ = 5297558112. Its totient is φ = 255467520.

The previous prime is 1197685429. The next prime is 1197685451. The reversal of 1197685440 is 445867911.

1197685440 is a `hidden beast` number, since 11 + 97 + 6 + 8 + 544 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1197685429) and next prime (1197685451).

It is a tau number, because it is divible by the number of its divisors (840).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 29211820 + ... + 29211860.

Almost surely, 2^1197685440 is an apocalyptic number.

1197685440 is a gapful number since it is divisible by the number (10) 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 1197685440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2648779056).

1197685440 is an abundant number, since it is smaller than the sum of its proper divisors (4099872672).

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

1197685440 is a wasteful number, since it uses less digits than its factorization.

1197685440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 1197685440 is about 34607.5922306074. The cubic root of 1197685440 is about 1061.9749108312.

The spelling of 1197685440 in words is "one billion, one hundred ninety-seven million, six hundred eighty-five thousand, four hundred forty".