4207640 has 32 divisors (see below), whose sum is σ = 9726480. Its totient is φ = 1636992.

The previous prime is 4207633. The next prime is 4207657. The reversal of 4207640 is 467024.

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, 59 + ... + 2901.

Almost surely, 2^4207640 is an apocalyptic number.

4207640 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 4207640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4863240).

4207640 is an abundant number, since it is smaller than the sum of its proper divisors (5518840).

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

4207640 is a wasteful number, since it uses less digits than its factorization.

4207640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2891 (or 2887 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 4207640 is about 2051.2532754392. The cubic root of 4207640 is about 161.4406354610.

The spelling of 4207640 in words is "four million, two hundred seven thousand, six hundred forty".