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1230840666 = 232116216367
BaseRepresentation
bin100100101011101…
…0010001101011010
310011210001011222100
41021113102031122
510010043400131
6322045104230
742333654516
oct11127221532
93153034870
101230840666
115818608a0
122a4258076
13168001cb3
14b967b146
15730cd7e6
hex495d235a

1230840666 has 24 divisors (see below), whose sum is σ = 2909260224. Its totient is φ = 372981960.

The previous prime is 1230840661. The next prime is 1230840673. The reversal of 1230840666 is 6660480321.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1230840666.

It is not an unprimeable number, because it can be changed into a prime (1230840661) 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, 3107986 + ... + 3108381.

It is an arithmetic number, because the mean of its divisors is an integer number (121219176).

Almost surely, 21230840666 is an apocalyptic number.

1230840666 is an abundant number, since it is smaller than the sum of its proper divisors (1678419558).

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

1230840666 is a wasteful number, since it uses less digits than its factorization.

1230840666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6216386 (or 6216383 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 1230840666 is about 35083.3388661912. The cubic root of 1230840666 is about 1071.6853128124.

The spelling of 1230840666 in words is "one billion, two hundred thirty million, eight hundred forty thousand, six hundred sixty-six".

Divisors: 1 2 3 6 9 11 18 22 33 66 99 198 6216367 12432734 18649101 37298202 55947303 68380037 111894606 136760074 205140111 410280222 615420333 1230840666