1912260440 has 16 divisors (see below), whose sum is σ = 4302586080. Its totient is φ = 764904160.

The previous prime is 1912260433. The next prime is 1912260443. The reversal of 1912260440 is 440622191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1912260443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23903216 + ... + 23903295.

It is an arithmetic number, because the mean of its divisors is an integer number (268911630).

Almost surely, 2^1912260440 is an apocalyptic number.

1912260440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1912260440 is an abundant number, since it is smaller than the sum of its proper divisors (2390325640).

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

1912260440 is a wasteful number, since it uses less digits than its factorization.

1912260440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47806522 (or 47806518 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1912260440 is about 43729.4001788271. The cubic root of 1912260440 is about 1241.2207108219.

The spelling of 1912260440 in words is "one billion, nine hundred twelve million, two hundred sixty thousand, four hundred forty".