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1028918358 = 232134397087
BaseRepresentation
bin111101010101000…
…000110001010110
32122201002110122100
4331111000301112
54101400341413
6250033142530
734332442656
oct7525006126
92581073570
101028918358
11488885656
122486baa46
13135223a40
149a918366
15604e4a73
hex3d540c56

1028918358 has 24 divisors (see below), whose sum is σ = 2400810048. Its totient is φ = 316590192.

The previous prime is 1028918351. The next prime is 1028918389. The reversal of 1028918358 is 8538198201.

It is a happy number.

1028918358 is a `hidden beast` number, since 1 + 0 + 289 + 18 + 358 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028918351) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2198310 + ... + 2198777.

It is an arithmetic number, because the mean of its divisors is an integer number (100033752).

Almost surely, 21028918358 is an apocalyptic number.

1028918358 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1028918358 is an abundant number, since it is smaller than the sum of its proper divisors (1371891690).

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

1028918358 is a wasteful number, since it uses less digits than its factorization.

1028918358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4397108 (or 4397105 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 1028918358 is about 32076.7572862345. The cubic root of 1028918358 is about 1009.5479982506.

The spelling of 1028918358 in words is "one billion, twenty-eight million, nine hundred eighteen thousand, three hundred fifty-eight".

Divisors: 1 2 3 6 9 13 18 26 39 78 117 234 4397087 8794174 13191261 26382522 39573783 57162131 79147566 114324262 171486393 342972786 514459179 1028918358