65280780 has 72 divisors (see below), whose sum is σ = 201010992. Its totient is φ = 17145216.

The previous prime is 65280767. The next prime is 65280811. The reversal of 65280780 is 8708256.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9354 + ... + 14766.

Almost surely, 2^65280780 is an apocalyptic number.

65280780 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 65280780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100505496).

65280780 is an abundant number, since it is smaller than the sum of its proper divisors (135730212).

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

65280780 is a wasteful number, since it uses less digits than its factorization.

65280780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5495 (or 5490 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 65280780 is about 8079.6522202382. The cubic root of 65280780 is about 402.6506875058.

The spelling of 65280780 in words is "sixty-five million, two hundred eighty thousand, seven hundred eighty".