64772442 has 48 divisors (see below), whose sum is σ = 163126080. Its totient is φ = 18190656.

The previous prime is 64772437. The next prime is 64772447. The reversal of 64772442 is 24427746.

It is a happy number.

64772442 is a `hidden beast` number, since 647 + 7 + 2 + 4 + 4 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (64772437) and next prime (64772447).

It is a junction number, because it is equal to n+sod(n) for n = 64772397 and 64772406.

It is not an unprimeable number, because it can be changed into a prime (64772447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3078 + ... + 11790.

It is an arithmetic number, because the mean of its divisors is an integer number (3398460).

Almost surely, 2^64772442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64772442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81563040).

64772442 is an abundant number, since it is smaller than the sum of its proper divisors (98353638).

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

64772442 is a wasteful number, since it uses less digits than its factorization.

64772442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8787 (or 8784 counting only the distinct ones).

The product of its digits is 75264, while the sum is 36.

The square root of 64772442 is about 8048.1328269357. The cubic root of 64772442 is about 401.6028229843.

The spelling of 64772442 in words is "sixty-four million, seven hundred seventy-two thousand, four hundred forty-two".