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99840064 = 2612492
BaseRepresentation
bin1011111001101…
…11000001000000
320221212101211011
411330313001000
5201024340224
613523530304
72321424622
oct574670100
9227771734
1099840064
11513a2355
1229529994
13178b8a7c
14d38cc12
158b72394
hex5f37040

99840064 has 21 divisors (see below), whose sum is σ = 198278877. Its totient is φ = 49880064.

The previous prime is 99840053. The next prime is 99840067. The reversal of 99840064 is 46004899.

The square root of 99840064 is 9992.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 40857664 + 58982400 = 6392^2 + 7680^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99839999 and 99840026.

It is not an unprimeable number, because it can be changed into a prime (99840067) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 79312 + ... + 80560.

Almost surely, 299840064 is an apocalyptic number.

99840064 is the 9992-nd square number.

It is an amenable number.

99840064 is a deficient number, since it is larger than the sum of its proper divisors (98438813).

99840064 is an frugal number, since it uses more digits than its factorization.

99840064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2510 (or 1251 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The cubic root of 99840064 is about 463.9112989382.

The spelling of 99840064 in words is "ninety-nine million, eight hundred forty thousand, sixty-four".

Divisors: 1 2 4 8 16 32 64 1249 2498 4996 9992 19984 39968 79936 1560001 3120002 6240004 12480008 24960016 49920032 99840064