420100240 has 40 divisors (see below), whose sum is σ = 1116267840. Its totient is φ = 144034176.

The previous prime is 420100223. The next prime is 420100249. The reversal of 420100240 is 42001024.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 420100240.

It is not an unprimeable number, because it can be changed into a prime (420100249) 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, 374530 + ... + 375649.

It is an arithmetic number, because the mean of its divisors is an integer number (27906696).

Almost surely, 2^420100240 is an apocalyptic number.

420100240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

420100240 is an abundant number, since it is smaller than the sum of its proper divisors (696167600).

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

420100240 is a wasteful number, since it uses less digits than its factorization.

420100240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750199 (or 750193 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 420100240 is about 20496.3469915983. The cubic root of 420100240 is about 748.9468121230.

Adding to 420100240 its reverse (42001024), we get a palindrome (462101264).

The spelling of 420100240 in words is "four hundred twenty million, one hundred thousand, two hundred forty".