1923478920 has 384 divisors, whose sum is σ = 7239456000. Its totient is φ = 453657600.

The previous prime is 1923478913. The next prime is 1923478951. The reversal of 1923478920 is 298743291.

1923478920 is a `hidden beast` number, since 1 + 92 + 3 + 478 + 92 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5357701 + ... + 5358059.

It is an arithmetic number, because the mean of its divisors is an integer number (18852750).

Almost surely, 2^1923478920 is an apocalyptic number.

1923478920 is a gapful number since it is divisible by the number (10) 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 1923478920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3619728000).

1923478920 is an abundant number, since it is smaller than the sum of its proper divisors (5315977080).

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

1923478920 is a wasteful number, since it uses less digits than its factorization.

1923478920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442 (or 421 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 1923478920 is about 43857.4841959728. The cubic root of 1923478920 is about 1243.6432309213.

The spelling of 1923478920 in words is "one billion, nine hundred twenty-three million, four hundred seventy-eight thousand, nine hundred twenty".