2539728 has 40 divisors (see below), whose sum is σ = 7291200. Its totient is φ = 846432.

The previous prime is 2539699. The next prime is 2539753. The reversal of 2539728 is 8279352.

It is a happy number.

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

It is a d-powerful number, because it can be written as 2⁷ + 5⁹ + 3¹⁰ + 9³ + 7⁴ + 2¹⁹ + 8 .

It is a junction number, because it is equal to n+sod(n) for n = 2539692 and 2539701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2508 + ... + 3371.

It is an arithmetic number, because the mean of its divisors is an integer number (182280).

2^2539728 is an apocalyptic number.

It is an amenable number.

2539728 is an abundant number, since it is smaller than the sum of its proper divisors (4751472).

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

2539728 is a wasteful number, since it uses less digits than its factorization.

2539728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5896 (or 5884 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 2539728 is about 1593.6524087768. The cubic root of 2539728 is about 136.4360284711.

It can be divided in two parts, 25397 and 28, that added together give a triangular number (25425 = T₂₂₅).

The spelling of 2539728 in words is "two million, five hundred thirty-nine thousand, seven hundred twenty-eight".