64220276 has 6 divisors (see below), whose sum is σ = 112385490. Its totient is φ = 32110136.

The previous prime is 64220249. The next prime is 64220279. The reversal of 64220276 is 67202246.

It can be written as a sum of positive squares in only one way, i.e., 50751376 + 13468900 = 7124^2 + 3670^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64220279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8027531 + ... + 8027538.

It is an arithmetic number, because the mean of its divisors is an integer number (18730915).

Almost surely, 2^64220276 is an apocalyptic number.

It is an amenable number.

64220276 is a deficient number, since it is larger than the sum of its proper divisors (48165214).

64220276 is a wasteful number, since it uses less digits than its factorization.

64220276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16055073 (or 16055071 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 64220276 is about 8013.7554242689. The cubic root of 64220276 is about 400.4583828456.

The spelling of 64220276 in words is "sixty-four million, two hundred twenty thousand, two hundred seventy-six".