231807420 has 168 divisors, whose sum is σ = 786645216. Its totient is φ = 57013632.

The previous prime is 231807419. The next prime is 231807473. The reversal of 231807420 is 24708132.

231807420 is a `hidden beast` number, since 231 + 8 + 0 + 7 + 420 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 188929 + ... + 190151.

It is an arithmetic number, because the mean of its divisors is an integer number (4682412).

Almost surely, 2^231807420 is an apocalyptic number.

231807420 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 231807420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (393322608).

231807420 is an abundant number, since it is smaller than the sum of its proper divisors (554837796).

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

231807420 is a wasteful number, since it uses less digits than its factorization.

231807420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1263 (or 1246 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 231807420 is about 15225.2231510740. The cubic root of 231807420 is about 614.2932988839.

The spelling of 231807420 in words is "two hundred thirty-one million, eight hundred seven thousand, four hundred twenty".