1918944270 has 48 divisors (see below), whose sum is σ = 5174048880. Its totient is φ = 511717824.

The previous prime is 1918944233. The next prime is 1918944301. The reversal of 1918944270 is 724498191.

It is a happy number.

It is a super-2 number, since 2×1918944270² = 7364694222731665800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 392415 + ... + 397274.

It is an arithmetic number, because the mean of its divisors is an integer number (107792685).

Almost surely, 2^1918944270 is an apocalyptic number.

1918944270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1918944270 is an abundant number, since it is smaller than the sum of its proper divisors (3255104610).

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

1918944270 is an equidigital number, since it uses as much as digits as its factorization.

1918944270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789711 (or 789699 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 1918944270 is about 43805.7561286185. The cubic root of 1918944270 is about 1242.6651551586.

The spelling of 1918944270 in words is "one billion, nine hundred eighteen million, nine hundred forty-four thousand, two hundred seventy".