1213741440 has 96 divisors (see below), whose sum is σ = 4191220800. Its totient is φ = 323662848.

The previous prime is 1213741439. The next prime is 1213741483. The reversal of 1213741440 is 441473121.

1213741440 is a `hidden beast` number, since 1 + 213 + 7 + 4 + 1 + 440 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-3 number, since 3×1213741440³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99600 + ... + 111119.

It is an arithmetic number, because the mean of its divisors is an integer number (43658550).

Almost surely, 2^1213741440 is an apocalyptic number.

1213741440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213741440 is an abundant number, since it is smaller than the sum of its proper divisors (2977479360).

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

1213741440 is a wasteful number, since it uses less digits than its factorization.

1213741440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210744 (or 210729 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 1213741440 is about 34838.7921719453. The cubic root of 1213741440 is about 1066.6994226052.

The spelling of 1213741440 in words is "one billion, two hundred thirteen million, seven hundred forty-one thousand, four hundred forty".