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30193288 = 233774161
BaseRepresentation
bin111001100101…
…1011010001000
32002210222101221
41303023122020
530212141123
62555051424
7514432036
oct163133210
962728357
1030193288
1116052734
12a140b74
136341c68
14401d556
1529b625d
hex1ccb688

30193288 has 8 divisors (see below), whose sum is σ = 56612430. Its totient is φ = 15096640.

The previous prime is 30193283. The next prime is 30193297. The reversal of 30193288 is 88239103.

It can be written as a sum of positive squares in only one way, i.e., 23213124 + 6980164 = 4818^2 + 2642^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×301932883 (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (30193283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1887073 + ... + 1887088.

Almost surely, 230193288 is an apocalyptic number.

It is an amenable number.

30193288 is a deficient number, since it is larger than the sum of its proper divisors (26419142).

30193288 is a wasteful number, since it uses less digits than its factorization.

30193288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3774167 (or 3774163 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 30193288 is about 5494.8419449516. The cubic root of 30193288 is about 311.3891455936.

The spelling of 30193288 in words is "thirty million, one hundred ninety-three thousand, two hundred eighty-eight".

Divisors: 1 2 4 8 3774161 7548322 15096644 30193288