421202340 has 72 divisors (see below), whose sum is σ = 1375935288. Its totient is φ = 103680000.

The previous prime is 421202333. The next prime is 421202371. The reversal of 421202340 is 43202124.

421202340 is a `hidden beast` number, since 421 + 202 + 3 + 40 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 91126116 + 330076224 = 9546^2 + 18168^2 .

It is a super-2 number, since 2×421202340² = 354822822442951200, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87661 + ... + 92340.

Almost surely, 2^421202340 is an apocalyptic number.

It is an amenable number.

421202340 is an abundant number, since it is smaller than the sum of its proper divisors (954732948).

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

421202340 is a wasteful number, since it uses less digits than its factorization.

421202340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180029 (or 180024 counting only the distinct ones).

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

The square root of 421202340 is about 20523.2146604766. The cubic root of 421202340 is about 749.6011746220.

Adding to 421202340 its reverse (43202124), we get a palindrome (464404464).

The spelling of 421202340 in words is "four hundred twenty-one million, two hundred two thousand, three hundred forty".