2539939428 has 72 divisors (see below), whose sum is σ = 7001904000. Its totient is φ = 771615936.

The previous prime is 2539939327. The next prime is 2539939429. The reversal of 2539939428 is 8249399352.

It is not an unprimeable number, because it can be changed into a prime (2539939429) 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, 2623 + ... + 71321.

Almost surely, 2^2539939428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2539939428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3500952000).

2539939428 is an abundant number, since it is smaller than the sum of its proper divisors (4461964572).

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

2539939428 is a wasteful number, since it uses less digits than its factorization.

2539939428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68801 (or 68796 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

The square root of 2539939428 is about 50397.8117382094. The cubic root of 2539939428 is about 1364.3981438783.

It can be divided in two parts, 25 and 39939428, that added together give a triangular number (39939453 = T₈₉₃₇).

The spelling of 2539939428 in words is "two billion, five hundred thirty-nine million, nine hundred thirty-nine thousand, four hundred twenty-eight".