1912479640 has 16 divisors (see below), whose sum is σ = 4303079280. Its totient is φ = 764991840.

The previous prime is 1912479619. The next prime is 1912479659. The reversal of 1912479640 is 469742191.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23905956 + ... + 23906035.

It is an arithmetic number, because the mean of its divisors is an integer number (268942455).

Almost surely, 2^1912479640 is an apocalyptic number.

1912479640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1912479640 is an abundant number, since it is smaller than the sum of its proper divisors (2390599640).

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

1912479640 is a wasteful number, since it uses less digits than its factorization.

1912479640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47812002 (or 47811998 counting only the distinct ones).

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

The square root of 1912479640 is about 43731.9064299740. The cubic root of 1912479640 is about 1241.2681355308.

The spelling of 1912479640 in words is "one billion, nine hundred twelve million, four hundred seventy-nine thousand, six hundred forty".