4247640 has 192 divisors, whose sum is σ = 15724800. Its totient is φ = 1026432.

The previous prime is 4247629. The next prime is 4247687. The reversal of 4247640 is 467424.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 184669 + ... + 184691.

It is an arithmetic number, because the mean of its divisors is an integer number (81900).

Almost surely, 2^4247640 is an apocalyptic number.

4247640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4247640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7862400).

4247640 is an abundant number, since it is smaller than the sum of its proper divisors (11477160).

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

4247640 is a wasteful number, since it uses less digits than its factorization.

4247640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 4247640 is about 2060.9803492513. The cubic root of 4247640 is about 161.9506022229.

The spelling of 4247640 in words is "four million, two hundred forty-seven thousand, six hundred forty".