1219946740 has 24 divisors (see below), whose sum is σ = 2569504392. Its totient is φ = 486528000.

The previous prime is 1219946701. The next prime is 1219946743. The reversal of 1219946740 is 476499121.

1219946740 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 293231376 + 926715364 = 17124^2 + 30442^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1219946743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83761 + ... + 97240.

It is an arithmetic number, because the mean of its divisors is an integer number (107062683).

Almost surely, 2^1219946740 is an apocalyptic number.

1219946740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1219946740 is an abundant number, since it is smaller than the sum of its proper divisors (1349557652).

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

1219946740 is a wasteful number, since it uses less digits than its factorization.

1219946740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181347 (or 181345 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 1219946740 is about 34927.7359701427. The cubic root of 1219946740 is about 1068.5141807714.

The spelling of 1219946740 in words is "one billion, two hundred nineteen million, nine hundred forty-six thousand, seven hundred forty".