1649400000 has 168 divisors, whose sum is σ = 5456682000. Its totient is φ = 439680000.

The previous prime is 1649399957. The next prime is 1649400019. The reversal of 1649400000 is 49461.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 598626 + ... + 601374.

It is an arithmetic number, because the mean of its divisors is an integer number (32480250).

Almost surely, 2^1649400000 is an apocalyptic number.

1649400000 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 1649400000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2728341000).

1649400000 is an abundant number, since it is smaller than the sum of its proper divisors (3807282000).

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

1649400000 is an frugal number, since it uses more digits than its factorization.

1649400000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2789 (or 2759 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1649400000 is about 40612.8058621908. The cubic root of 1649400000 is about 1181.5225008903.

Adding to 1649400000 its reverse (49461), we get a palindrome (1649449461).

The spelling of 1649400000 in words is "one billion, six hundred forty-nine million, four hundred thousand".