1922871840 has 48 divisors (see below), whose sum is σ = 6057047808. Its totient is φ = 512765696.

The previous prime is 1922871823. The next prime is 1922871917. The reversal of 1922871840 is 481782291.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×1922871840² = 7394872226129971200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1922871792 and 1922871801.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2002512 + ... + 2003471.

It is an arithmetic number, because the mean of its divisors is an integer number (126188496).

Almost surely, 2^1922871840 is an apocalyptic number.

1922871840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1922871840 is an abundant number, since it is smaller than the sum of its proper divisors (4134175968).

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

1922871840 is a wasteful number, since it uses less digits than its factorization.

1922871840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4006001 (or 4005993 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 1922871840 is about 43850.5625961629. The cubic root of 1922871840 is about 1243.5123794092.

The spelling of 1922871840 in words is "one billion, nine hundred twenty-two million, eight hundred seventy-one thousand, eight hundred forty".