2148939840 has 224 divisors, whose sum is σ = 7102181376. Its totient is φ = 549918720.

The previous prime is 2148939829. The next prime is 2148939853. The reversal of 2148939840 is 489398412.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 2148939840.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4850659 + ... + 4851101.

Almost surely, 2^2148939840 is an apocalyptic number.

2148939840 is a gapful number since it is divisible by the number (20) 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 2148939840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3551090688).

2148939840 is an abundant number, since it is smaller than the sum of its proper divisors (4953241536).

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

2148939840 is a wasteful number, since it uses less digits than its factorization.

2148939840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657 (or 647 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The square root of 2148939840 is about 46356.6590685740. The cubic root of 2148939840 is about 1290.4507048408.

The spelling of 2148939840 in words is "two billion, one hundred forty-eight million, nine hundred thirty-nine thousand, eight hundred forty".