2529640 has 16 divisors (see below), whose sum is σ = 5691780. Its totient is φ = 1011840.

The previous prime is 2529619. The next prime is 2529643. The reversal of 2529640 is 469252.

It can be written as a sum of positive squares in 2 ways, for example, as 2452356 + 77284 = 1566^2 + 278^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2529599 and 2529608.

It is not an unprimeable number, because it can be changed into a prime (2529643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31581 + ... + 31660.

2^2529640 is an apocalyptic number.

2529640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2529640 is an abundant number, since it is smaller than the sum of its proper divisors (3162140).

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

2529640 is a wasteful number, since it uses less digits than its factorization.

2529640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63252 (or 63248 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 2529640 is about 1590.4842030023. The cubic root of 2529640 is about 136.2551438734.

The spelling of 2529640 in words is "two million, five hundred twenty-nine thousand, six hundred forty".