1920651264 has 260 divisors, whose sum is σ = 6565119264. Its totient is φ = 548093952.

The previous prime is 1920651217. The next prime is 1920651281. The reversal of 1920651264 is 4621560291.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2322019 + ... + 2322845.

Almost surely, 2^1920651264 is an apocalyptic number.

1920651264 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1920651264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3282559632).

1920651264 is an abundant number, since it is smaller than the sum of its proper divisors (4644468000).

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

1920651264 is an frugal number, since it uses more digits than its factorization.

1920651264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870 (or 839 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1920651264 is about 43825.2354699892. The cubic root of 1920651264 is about 1243.0335162641.

The spelling of 1920651264 in words is "one billion, nine hundred twenty million, six hundred fifty-one thousand, two hundred sixty-four".