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61728396 = 2235987187
BaseRepresentation
bin1110101101111…
…0011010001100
311022011010102220
43223132122030
5111300302041
610043015340
71346453112
oct353363214
9138133386
1061728396
1131931504
121880a550
13ca338a2
1482abab2
155644d66
hex3ade68c

61728396 has 24 divisors (see below), whose sum is σ = 146475840. Its totient is φ = 20227152.

The previous prime is 61728391. The next prime is 61728413. The reversal of 61728396 is 69382716.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (61728391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42886 + ... + 44301.

It is an arithmetic number, because the mean of its divisors is an integer number (6103160).

Almost surely, 261728396 is an apocalyptic number.

It is an amenable number.

61728396 is an abundant number, since it is smaller than the sum of its proper divisors (84747444).

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

61728396 is a wasteful number, since it uses less digits than its factorization.

61728396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87253 (or 87251 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 61728396 is about 7856.7420728951. The cubic root of 61728396 is about 395.2103691680.

The spelling of 61728396 in words is "sixty-one million, seven hundred twenty-eight thousand, three hundred ninety-six".

Divisors: 1 2 3 4 6 12 59 118 177 236 354 708 87187 174374 261561 348748 523122 1046244 5144033 10288066 15432099 20576132 30864198 61728396