1840428732 has 48 divisors (see below), whose sum is σ = 4336882592. Its totient is φ = 607426560.

The previous prime is 1840428691. The next prime is 1840428757. The reversal of 1840428732 is 2378240481.

It is a super-2 number, since 2×1840428732² = 6774355835142255648, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 588132 + ... + 591252.

Almost surely, 2^1840428732 is an apocalyptic number.

1840428732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1840428732 is an abundant number, since it is smaller than the sum of its proper divisors (2496453860).

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

1840428732 is a wasteful number, since it uses less digits than its factorization.

1840428732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3598 (or 3596 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 39.

The square root of 1840428732 is about 42900.2183211228. The cubic root of 1840428732 is about 1225.4803018973.

The spelling of 1840428732 in words is "one billion, eight hundred forty million, four hundred twenty-eight thousand, seven hundred thirty-two".