6249640 has 16 divisors (see below), whose sum is σ = 14061780. Its totient is φ = 2499840.

The previous prime is 6249619. The next prime is 6249647. The reversal of 6249640 is 469426.

It can be written as a sum of positive squares in 2 ways, for example, as 5008644 + 1240996 = 2238^2 + 1114^2 .

It is not an unprimeable number, because it can be changed into a prime (6249647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78081 + ... + 78160.

Almost surely, 2^6249640 is an apocalyptic number.

It is an amenable number.

6249640 is an abundant number, since it is smaller than the sum of its proper divisors (7812140).

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

6249640 is a wasteful number, since it uses less digits than its factorization.

6249640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156252 (or 156248 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 6249640 is about 2499.9279989632. The cubic root of 6249640 is about 184.1980381939.

It can be divided in two parts, 6249 and 640, that added together give a square (6889 = 83²).

The spelling of 6249640 in words is "six million, two hundred forty-nine thousand, six hundred forty".