238145520 has 80 divisors (see below), whose sum is σ = 781691040. Its totient is φ = 59768832.

The previous prime is 238145471. The next prime is 238145521. The reversal of 238145520 is 25541832.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238145521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25105 + ... + 33264.

It is an arithmetic number, because the mean of its divisors is an integer number (9771138).

Almost surely, 2^238145520 is an apocalyptic number.

238145520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

238145520 is an abundant number, since it is smaller than the sum of its proper divisors (543545520).

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

238145520 is a wasteful number, since it uses less digits than its factorization.

238145520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58402 (or 58396 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 238145520 is about 15431.9642301296. The cubic root of 238145520 is about 619.8417216503.

The spelling of 238145520 in words is "two hundred thirty-eight million, one hundred forty-five thousand, five hundred twenty".