Search a number
-
+
64728825 = 3527139887
BaseRepresentation
bin1111011011101…
…0111011111001
311111210120020220
43312322323321
5113032310300
610231210253
71414120530
oct366727371
9144716226
1064728825
11335a07a7
1219816989
13105444a5
14884d317
155a38da0
hex3dbaef9

64728825 has 48 divisors (see below), whose sum is σ = 123325440. Its totient is φ = 29344320.

The previous prime is 64728793. The next prime is 64728857. The reversal of 64728825 is 52882746.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (64728793) and next prime (64728857).

It is not a de Polignac number, because 64728825 - 25 = 64728793 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 72532 + ... + 73418.

It is an arithmetic number, because the mean of its divisors is an integer number (2569280).

Almost surely, 264728825 is an apocalyptic number.

It is an amenable number.

64728825 is a deficient number, since it is larger than the sum of its proper divisors (58596615).

64728825 is a wasteful number, since it uses less digits than its factorization.

64728825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046 (or 1041 counting only the distinct ones).

The product of its digits is 215040, while the sum is 42.

The square root of 64728825 is about 8045.4226116469. The cubic root of 64728825 is about 401.5126578713.

The spelling of 64728825 in words is "sixty-four million, seven hundred twenty-eight thousand, eight hundred twenty-five".

Divisors: 1 3 5 7 15 21 25 35 75 105 139 175 417 525 695 887 973 2085 2661 2919 3475 4435 4865 6209 10425 13305 14595 18627 22175 24325 31045 66525 72975 93135 123293 155225 369879 465675 616465 863051 1849395 2589153 3082325 4315255 9246975 12945765 21576275 64728825