4287940 has 24 divisors (see below), whose sum is σ = 9316440. Its totient is φ = 1655808.

The previous prime is 4287937. The next prime is 4287949. The reversal of 4287940 is 497824.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 93636 + 4194304 = 306^2 + 2048^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4287896 and 4287905.

It is not an unprimeable number, because it can be changed into a prime (4287949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3117 + ... + 4276.

It is an arithmetic number, because the mean of its divisors is an integer number (388185).

Almost surely, 2^4287940 is an apocalyptic number.

It is an amenable number.

4287940 is an abundant number, since it is smaller than the sum of its proper divisors (5028500).

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

4287940 is a wasteful number, since it uses less digits than its factorization.

4287940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7431 (or 7429 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 4287940 is about 2070.7341693226. The cubic root of 4287940 is about 162.4611662628.

The spelling of 4287940 in words is "four million, two hundred eighty-seven thousand, nine hundred forty".