4239981540 has 72 divisors (see below), whose sum is σ = 13304786040. Its totient is φ = 1091672064.

The previous prime is 4239981539. The next prime is 4239981583. The reversal of 4239981540 is 451899324.

4239981540 is a `hidden beast` number, since 4 + 23 + 9 + 9 + 81 + 540 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 523128384 + 3716853156 = 22872^2 + 60966^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 400909 + ... + 411348.

It is an arithmetic number, because the mean of its divisors is an integer number (184788695).

Almost surely, 2^4239981540 is an apocalyptic number.

It is an amenable number.

4239981540 is an abundant number, since it is smaller than the sum of its proper divisors (9064804500).

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

4239981540 is a wasteful number, since it uses less digits than its factorization.

4239981540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812301 (or 812296 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 4239981540 is about 65115.1406356463. The cubic root of 4239981540 is about 1618.5321179990.

The spelling of 4239981540 in words is "four billion, two hundred thirty-nine million, nine hundred eighty-one thousand, five hundred forty".