420024240 has 60 divisors (see below), whose sum is σ = 1410583824. Its totient is φ = 112006272.

The previous prime is 420024233. The next prime is 420024247. The reversal of 420024240 is 42420024.

420024240 is a `hidden beast` number, since 420 + 0 + 2 + 4 + 240 = 666.

It is an interprime number because it is at equal distance from previous prime (420024233) and next prime (420024247).

It is a tau number, because it is divible by the number of its divisors (60).

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

It is not an unprimeable number, because it can be changed into a prime (420024247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 290964 + ... + 292403.

Almost surely, 2^420024240 is an apocalyptic number.

420024240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

420024240 is an abundant number, since it is smaller than the sum of its proper divisors (990559584).

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

420024240 is a wasteful number, since it uses less digits than its factorization.

420024240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583386 (or 583377 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 420024240 is about 20494.4929188307. The cubic root of 420024240 is about 748.9016456087.

Adding to 420024240 its reverse (42420024), we get a palindrome (462444264).

The spelling of 420024240 in words is "four hundred twenty million, twenty-four thousand, two hundred forty".