234778464820 has 96 divisors (see below), whose sum is σ = 531949130496. Its totient is φ = 86817561600.

The previous prime is 234778464787. The next prime is 234778464821. The reversal of 234778464820 is 28464877432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234778464821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1959850 + ... + 2076190.

It is an arithmetic number, because the mean of its divisors is an integer number (5541136776).

Almost surely, 2^234778464820 is an apocalyptic number.

234778464820 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 234778464820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265974565248).

234778464820 is an abundant number, since it is smaller than the sum of its proper divisors (297170665676).

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

234778464820 is a wasteful number, since it uses less digits than its factorization.

234778464820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116521 (or 116519 counting only the distinct ones).

The product of its (nonzero) digits is 14450688, while the sum is 55.

The spelling of 234778464820 in words is "two hundred thirty-four billion, seven hundred seventy-eight million, four hundred sixty-four thousand, eight hundred twenty".