1912653890 has 32 divisors (see below), whose sum is σ = 3971389824. Its totient is φ = 649635840.

The previous prime is 1912653887. The next prime is 1912653929. The reversal of 1912653890 is 983562191.

It is a happy number.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120191 + ... + 135170.

It is an arithmetic number, because the mean of its divisors is an integer number (124105932).

Almost surely, 2^1912653890 is an apocalyptic number.

1912653890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1912653890 is an abundant number, since it is smaller than the sum of its proper divisors (2058735934).

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

1912653890 is a wasteful number, since it uses less digits than its factorization.

1912653890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255482.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 1912653890 is about 43733.8986370984. The cubic root of 1912653890 is about 1241.3058325603.

The spelling of 1912653890 in words is "one billion, nine hundred twelve million, six hundred fifty-three thousand, eight hundred ninety".