65306820 has 24 divisors (see below), whose sum is σ = 182859264. Its totient is φ = 17415136.

The previous prime is 65306803. The next prime is 65306831. The reversal of 65306820 is 2860356.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 544164 + ... + 544283.

It is an arithmetic number, because the mean of its divisors is an integer number (7619136).

Almost surely, 2^65306820 is an apocalyptic number.

65306820 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65306820 is an abundant number, since it is smaller than the sum of its proper divisors (117552444).

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

65306820 is a wasteful number, since it uses less digits than its factorization.

65306820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088459 (or 1088457 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 65306820 is about 8081.2635150699. The cubic root of 65306820 is about 402.7042184740.

The spelling of 65306820 in words is "sixty-five million, three hundred six thousand, eight hundred twenty".