265720620 has 96 divisors (see below), whose sum is σ = 839704320. Its totient is φ = 62191360.

The previous prime is 265720619. The next prime is 265720627. The reversal of 265720620 is 26027562.

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

It is not an unprimeable number, because it can be changed into a prime (265720627) 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, 12199 + ... + 26081.

It is an arithmetic number, because the mean of its divisors is an integer number (8746920).

Almost surely, 2^265720620 is an apocalyptic number.

265720620 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 265720620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (419852160).

265720620 is an abundant number, since it is smaller than the sum of its proper divisors (573983700).

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

265720620 is a wasteful number, since it uses less digits than its factorization.

265720620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13935 (or 13933 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 265720620 is about 16300.9392367434. The cubic root of 265720620 is about 642.8975228251.

The spelling of 265720620 in words is "two hundred sixty-five million, seven hundred twenty thousand, six hundred twenty".