1831738428 has 144 divisors (see below), whose sum is σ = 5261729760. Its totient is φ = 547803648.

The previous prime is 1831738333. The next prime is 1831738429. The reversal of 1831738428 is 8248371381.

1831738428 is a `hidden beast` number, since 183 + 17 + 38 + 428 = 666.

It is a super-2 number, since 2×1831738428² = 6710531337223822368, which contains 22 as substring.

Its product of digits (258048) is a multiple of the sum of its prime divisors (1008).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1831738429) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1921600 + ... + 1922552.

It is an arithmetic number, because the mean of its divisors is an integer number (36539790).

Almost surely, 2^1831738428 is an apocalyptic number.

1831738428 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 1831738428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2630864880).

1831738428 is an abundant number, since it is smaller than the sum of its proper divisors (3429991332).

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

1831738428 is a wasteful number, since it uses less digits than its factorization.

1831738428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053 (or 1008 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 1831738428 is about 42798.8133947660. The cubic root of 1831738428 is about 1223.5483964508.

The spelling of 1831738428 in words is "one billion, eight hundred thirty-one million, seven hundred thirty-eight thousand, four hundred twenty-eight".