1829901780 has 432 divisors, whose sum is σ = 6989673600. Its totient is φ = 393590016.

The previous prime is 1829901767. The next prime is 1829901803. The reversal of 1829901780 is 871099281.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 12281146 + ... + 12281294.

It is an arithmetic number, because the mean of its divisors is an integer number (16179800).

Almost surely, 2^1829901780 is an apocalyptic number.

1829901780 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 1829901780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3494836800).

1829901780 is an abundant number, since it is smaller than the sum of its proper divisors (5159771820).

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

1829901780 is a wasteful number, since it uses less digits than its factorization.

1829901780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 45.

The square root of 1829901780 is about 42777.3512503988. The cubic root of 1829901780 is about 1223.1393170788.

The spelling of 1829901780 in words is "one billion, eight hundred twenty-nine million, nine hundred one thousand, seven hundred eighty".