1920464838 has 36 divisors (see below), whose sum is σ = 4251510900. Its totient is φ = 626521656.

The previous prime is 1920464831. The next prime is 1920464939. The reversal of 1920464838 is 8384640291.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1920464793 and 1920464802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920464831) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 15613 + ... + 63911.

It is an arithmetic number, because the mean of its divisors is an integer number (118097525).

Almost surely, 2^1920464838 is an apocalyptic number.

1920464838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1920464838 is an abundant number, since it is smaller than the sum of its proper divisors (2331046062).

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

1920464838 is a wasteful number, since it uses less digits than its factorization.

1920464838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48401 (or 48351 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 1920464838 is about 43823.1084931227. The cubic root of 1920464838 is about 1242.9932970481.

The spelling of 1920464838 in words is "one billion, nine hundred twenty million, four hundred sixty-four thousand, eight hundred thirty-eight".