2139630480 has 120 divisors (see below), whose sum is σ = 7738364088. Its totient is φ = 526675968.

The previous prime is 2139630473. The next prime is 2139630481. The reversal of 2139630480 is 840369312.

2139630480 is a `hidden beast` number, since 2 + 13 + 9 + 630 + 4 + 8 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 55890576 + 2083739904 = 7476^2 + 45648^2 .

It is a tau number, because it is divible by the number of its divisors (120).

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

It is not an unprimeable number, because it can be changed into a prime (2139630481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104937 + ... + 123656.

Almost surely, 2^2139630480 is an apocalyptic number.

2139630480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2139630480 is an abundant number, since it is smaller than the sum of its proper divisors (5598733608).

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

2139630480 is a wasteful number, since it uses less digits than its factorization.

2139630480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228625 (or 228616 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 2139630480 is about 46256.1399167721. The cubic root of 2139630480 is about 1288.5845661263.

Adding to 2139630480 its reverse (840369312), we get a palindrome (2979999792).

The spelling of 2139630480 in words is "two billion, one hundred thirty-nine million, six hundred thirty thousand, four hundred eighty".