1930857440 has 24 divisors (see below), whose sum is σ = 4561651080. Its totient is φ = 772342912.

The previous prime is 1930857421. The next prime is 1930857443. The reversal of 1930857440 is 447580391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1930857443) 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, 6033770 + ... + 6034089.

It is an arithmetic number, because the mean of its divisors is an integer number (190068795).

Almost surely, 2^1930857440 is an apocalyptic number.

1930857440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1930857440 is an abundant number, since it is smaller than the sum of its proper divisors (2630793640).

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

1930857440 is a wasteful number, since it uses less digits than its factorization.

1930857440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12067874 (or 12067866 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 1930857440 is about 43941.5229594970. The cubic root of 1930857440 is about 1245.2314188397.

The spelling of 1930857440 in words is "one billion, nine hundred thirty million, eight hundred fifty-seven thousand, four hundred forty".