236406420 has 144 divisors (see below), whose sum is σ = 792529920. Its totient is φ = 56736768.

The previous prime is 236406407. The next prime is 236406433. The reversal of 236406420 is 24604632.

236406420 is a `hidden beast` number, since 236 + 4 + 0 + 6 + 420 = 666.

It is an interprime number because it is at equal distance from previous prime (236406407) and next prime (236406433).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 68701 + ... + 72059.

It is an arithmetic number, because the mean of its divisors is an integer number (5503680).

Almost surely, 2^236406420 is an apocalyptic number.

236406420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 236406420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (396264960).

236406420 is an abundant number, since it is smaller than the sum of its proper divisors (556123500).

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

236406420 is a wasteful number, since it uses less digits than its factorization.

236406420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3414 (or 3409 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 236406420 is about 15375.5136499565. The cubic root of 236406420 is about 618.3291990401.

The spelling of 236406420 in words is "two hundred thirty-six million, four hundred six thousand, four hundred twenty".