1840864428 has 192 divisors, whose sum is σ = 5317401600. Its totient is φ = 547223040.

The previous prime is 1840864411. The next prime is 1840864429. The reversal of 1840864428 is 8244680481.

It is not an unprimeable number, because it can be changed into a prime (1840864429) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5881200 + ... + 5881512.

It is an arithmetic number, because the mean of its divisors is an integer number (27694800).

Almost surely, 2^1840864428 is an apocalyptic number.

1840864428 is a gapful number since it is divisible by the number (18) 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 1840864428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2658700800).

1840864428 is an abundant number, since it is smaller than the sum of its proper divisors (3476537172).

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

1840864428 is a wasteful number, since it uses less digits than its factorization.

1840864428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469 (or 461 counting only the distinct ones).

The product of its (nonzero) digits is 393216, while the sum is 45.

The square root of 1840864428 is about 42905.2960367365. The cubic root of 1840864428 is about 1225.5769994272.

The spelling of 1840864428 in words is "one billion, eight hundred forty million, eight hundred sixty-four thousand, four hundred twenty-eight".