1649898432 has 168 divisors, whose sum is σ = 5820659936. Its totient is φ = 435124224.

The previous prime is 1649898403. The next prime is 1649898451. The reversal of 1649898432 is 2348989461.

It is a tau number, because it is divible by the number of its divisors (168).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36678 + ... + 68154.

Almost surely, 2^1649898432 is an apocalyptic number.

1649898432 is a gapful number since it is divisible by the number (12) 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 1649898432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2910329968).

1649898432 is an abundant number, since it is smaller than the sum of its proper divisors (4170761504).

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

1649898432 is a wasteful number, since it uses less digits than its factorization.

1649898432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31515 (or 31502 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 54.

The square root of 1649898432 is about 40618.9417882839. The cubic root of 1649898432 is about 1181.6415036211.

The spelling of 1649898432 in words is "one billion, six hundred forty-nine million, eight hundred ninety-eight thousand, four hundred thirty-two".