2140509780 has 192 divisors, whose sum is σ = 7080514560. Its totient is φ = 534988800.

The previous prime is 2140509779. The next prime is 2140509799. The reversal of 2140509780 is 879050412.

2140509780 is a `hidden beast` number, since 2 + 140 + 509 + 7 + 8 + 0 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3956310 + ... + 3956850.

It is an arithmetic number, because the mean of its divisors is an integer number (36877680).

Almost surely, 2^2140509780 is an apocalyptic number.

2140509780 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 2140509780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3540257280).

2140509780 is an abundant number, since it is smaller than the sum of its proper divisors (4940004780).

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

2140509780 is a wasteful number, since it uses less digits than its factorization.

2140509780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007 (or 999 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 2140509780 is about 46265.6436246163. The cubic root of 2140509780 is about 1288.7610603454.

The spelling of 2140509780 in words is "two billion, one hundred forty million, five hundred nine thousand, seven hundred eighty".