1840756428 has 120 divisors (see below), whose sum is σ = 5540057600. Its totient is φ = 522057312.

The previous prime is 1840756397. The next prime is 1840756483. The reversal of 1840756428 is 8246570481.

1840756428 is a `hidden beast` number, since 1 + 84 + 0 + 7 + 564 + 2 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 312333 + ... + 318171.

Almost surely, 2^1840756428 is an apocalyptic number.

1840756428 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 1840756428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2770028800).

1840756428 is an abundant number, since it is smaller than the sum of its proper divisors (3699301172).

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

1840756428 is a wasteful number, since it uses less digits than its factorization.

1840756428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6001 (or 5990 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The square root of 1840756428 is about 42904.0374323909. The cubic root of 1840756428 is about 1225.5530315379.

The spelling of 1840756428 in words is "one billion, eight hundred forty million, seven hundred fifty-six thousand, four hundred twenty-eight".