1213493760 has 240 divisors, whose sum is σ = 4340793600. Its totient is φ = 312975360.

The previous prime is 1213493759. The next prime is 1213493783. The reversal of 1213493760 is 673943121.

It is a tau number, because it is divible by the number of its divisors (240).

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 23 ways as a sum of consecutive naturals, for example, 713391 + ... + 715089.

It is an arithmetic number, because the mean of its divisors is an integer number (18086640).

Almost surely, 2^1213493760 is an apocalyptic number.

1213493760 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 1213493760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2170396800).

1213493760 is an abundant number, since it is smaller than the sum of its proper divisors (3127299840).

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

1213493760 is a wasteful number, since it uses less digits than its factorization.

1213493760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1759 (or 1740 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 1213493760 is about 34835.2373323335. The cubic root of 1213493760 is about 1066.6268596256.

The spelling of 1213493760 in words is "one billion, two hundred thirteen million, four hundred ninety-three thousand, seven hundred sixty".