1915873940 has 24 divisors (see below), whose sum is σ = 4080004992. Its totient is φ = 755555360.

The previous prime is 1915873931. The next prime is 1915873943. The reversal of 1915873940 is 493785191.

It is a super-2 number, since 2×1915873940² = 7341145907942247200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1915873943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 673184 + ... + 676023.

It is an arithmetic number, because the mean of its divisors is an integer number (170000208).

Almost surely, 2^1915873940 is an apocalyptic number.

1915873940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1915873940 is an abundant number, since it is smaller than the sum of its proper divisors (2164131052).

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

1915873940 is a wasteful number, since it uses less digits than its factorization.

1915873940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349287 (or 1349285 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 47.

The square root of 1915873940 is about 43770.6972756889. The cubic root of 1915873940 is about 1242.0020424835.

The spelling of 1915873940 in words is "one billion, nine hundred fifteen million, eight hundred seventy-three thousand, nine hundred forty".