64642248 has 48 divisors (see below), whose sum is σ = 190990800. Its totient is φ = 19588320.

The previous prime is 64642243. The next prime is 64642261. The reversal of 64642248 is 84224646.

It is a happy number.

64642248 is a `hidden beast` number, since 6 + 4 + 642 + 2 + 4 + 8 = 666.

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

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (64642241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40018 + ... + 41601.

It is an arithmetic number, because the mean of its divisors is an integer number (3978975).

Almost surely, 2^64642248 is an apocalyptic number.

It is an amenable number.

64642248 is an abundant number, since it is smaller than the sum of its proper divisors (126348552).

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

64642248 is a wasteful number, since it uses less digits than its factorization.

64642248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81642 (or 81635 counting only the distinct ones).

The product of its digits is 73728, while the sum is 36.

The square root of 64642248 is about 8040.0402984065. The cubic root of 64642248 is about 401.3335657319. Note that the first 3 decimals are identical.

The spelling of 64642248 in words is "sixty-four million, six hundred forty-two thousand, two hundred forty-eight".