1213480782 has 24 divisors (see below), whose sum is σ = 2743522704. Its totient is φ = 386906784.

The previous prime is 1213480777. The next prime is 1213480787. The reversal of 1213480782 is 2870843121.

It is an interprime number because it is at equal distance from previous prime (1213480777) and next prime (1213480787).

It is a super-4 number, since 4×1213480782⁴ (a number of 37 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213480787) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1465143 + ... + 1465970.

It is an arithmetic number, because the mean of its divisors is an integer number (114313446).

Almost surely, 2^1213480782 is an apocalyptic number.

1213480782 is an abundant number, since it is smaller than the sum of its proper divisors (1530041922).

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

1213480782 is a wasteful number, since it uses less digits than its factorization.

1213480782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2931144 (or 2931141 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 1213480782 is about 34835.0510549360. The cubic root of 1213480782 is about 1066.6230571798.

The spelling of 1213480782 in words is "one billion, two hundred thirteen million, four hundred eighty thousand, seven hundred eighty-two".