265153890 has 64 divisors (see below), whose sum is σ = 667118592. Its totient is φ = 67320000.

The previous prime is 265153871. The next prime is 265153891. The reversal of 265153890 is 98351562.

265153890 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (265153891) 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, 172425 + ... + 173955.

It is an arithmetic number, because the mean of its divisors is an integer number (10423728).

Almost surely, 2^265153890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265153890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (333559296).

265153890 is an abundant number, since it is smaller than the sum of its proper divisors (401964702).

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

265153890 is a wasteful number, since it uses less digits than its factorization.

265153890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1815.

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 265153890 is about 16283.5466038575. The cubic root of 265153890 is about 642.4401393660.

The spelling of 265153890 in words is "two hundred sixty-five million, one hundred fifty-three thousand, eight hundred ninety".