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99630728 = 2335292
BaseRepresentation
bin1011111000000…
…11111010001000
320221110202122222
411330003322020
5201001140403
613515233212
72316563411
oct574037210
9227422588
1099630728
115126a04a
1229448808
13178446c2
14d336808
158b30338
hex5f03e88

99630728 has 12 divisors (see below), whose sum is σ = 186860565. Its totient is φ = 49801248.

The previous prime is 99630709. The next prime is 99630799. The reversal of 99630728 is 82703699.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 78818884 + 20811844 = 8878^2 + 4562^2 .

It is an ABA number since it can be written as A⋅BA, here for A=2, B=7058.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 26468 + ... + 29996.

Almost surely, 299630728 is an apocalyptic number.

It is an amenable number.

99630728 is a deficient number, since it is larger than the sum of its proper divisors (87229837).

99630728 is an frugal number, since it uses more digits than its factorization.

99630728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7064 (or 3531 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 99630728 is about 9981.5193232293. The cubic root of 99630728 is about 463.5868423894.

The spelling of 99630728 in words is "ninety-nine million, six hundred thirty thousand, seven hundred twenty-eight".

Divisors: 1 2 4 8 3529 7058 14116 28232 12453841 24907682 49815364 99630728