65057280 has 160 divisors (see below), whose sum is σ = 213897024. Its totient is φ = 16859136.

The previous prime is 65057263. The next prime is 65057281. The reversal of 65057280 is 8275056.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (160).

It is not an unprimeable number, because it can be changed into a prime (65057281) 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, 330142 + ... + 330338.

Almost surely, 2^65057280 is an apocalyptic number.

65057280 is a gapful number since it is divisible by the number (60) 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 65057280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106948512).

65057280 is an abundant number, since it is smaller than the sum of its proper divisors (148839744).

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

65057280 is a wasteful number, since it uses less digits than its factorization.

65057280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 65057280 is about 8065.8093208307. The cubic root of 65057280 is about 402.1906474247.

The spelling of 65057280 in words is "sixty-five million, fifty-seven thousand, two hundred eighty".