1918429396 has 36 divisors (see below), whose sum is σ = 3840718588. Its totient is φ = 833338368.

The previous prime is 1918429349. The next prime is 1918429423. The reversal of 1918429396 is 6939248191.

It can be written as a sum of positive squares in 6 ways, for example, as 125753796 + 1792675600 = 11214^2 + 42340^2 .

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (52).

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, 48801 + ... + 78856.

Almost surely, 2^1918429396 is an apocalyptic number.

It is an amenable number.

1918429396 is an abundant number, since it is smaller than the sum of its proper divisors (1922289192).

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

1918429396 is a wasteful number, since it uses less digits than its factorization.

1918429396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127708 (or 127689 counting only the distinct ones).

The product of its digits is 839808, while the sum is 52.

The square root of 1918429396 is about 43799.8789496044. The cubic root of 1918429396 is about 1242.5540049425.

The spelling of 1918429396 in words is "one billion, nine hundred eighteen million, four hundred twenty-nine thousand, three hundred ninety-six".