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4062240 = 2532571331

4062240 has 288 divisors, whose sum is σ = 17611776. Its totient is φ = 829440.

The previous prime is 4062221. The next prime is 4062241. The reversal of 4062240 is 422604.

4062240 is a `hidden beast` number, since 4 + 0 + 622 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is not an unprimeable number, because it can be changed into a prime (4062241) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 131025 + ... + 131055.

It is an arithmetic number, because the mean of its divisors is an integer number (61152).

Almost surely, 24062240 is an apocalyptic number.

4062240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is a pronic number, being equal to 2015×2016.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4062240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8805888).

4062240 is an abundant number, since it is smaller than the sum of its proper divisors (13549536).

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

4062240 is a wasteful number, since it uses less digits than its factorization.

4062240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 4062240 is about 2015.4999379806. The cubic root of 4062240 is about 159.5592033966.

Adding to 4062240 its reverse (422604), we get a palindrome (4484844).

The spelling of 4062240 in words is "four million, sixty-two thousand, two hundred forty".